从文件路径显示图像视图?

我需要只使用文件名来显示图像，而不是使用资源id。

ImageView imgView = new ImageView(this);
imgView.setBackgroundResource(R.drawable.img1);

我在可绘制文件夹中有图像img1。我想展示文件中的图像。

我该怎么做呢?

568293 次浏览
小开

我想你可以用这个

Bitmap bmImg = BitmapFactory.decodeFile("path of your img1");
imageView.setImageBitmap(bmImg);
小开
最佳答案

Labeeb是对的，为什么你需要设置图像使用路径，如果你的资源已经放在资源文件夹，

只有当图像存储在SD-Card中时，才需要这种路径。

和尝试下面的代码来设置存储在sd卡中的文件中的位图图像。

File imgFile = new  File("/sdcard/Images/test_image.jpg");


if(imgFile.exists()){


Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());


ImageView myImage = (ImageView) findViewById(R.id.imageviewTest);


myImage.setImageBitmap(myBitmap);


}

并将此权限包含在manifest文件中:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
小开

你还可以使用:




File imgFile = new  File(“filepath”);
if(imgFile.exists())
{
ImageView myImage = new ImageView(this);
myImage.setImageURI(Uri.fromFile(imgFile));


}

这为您隐式地完成位图解码。

小开 
String path = Environment.getExternalStorageDirectory()+ "/Images/test.jpg";


File imgFile = new File(path);
if(imgFile.exists())
{
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
ImageView imageView=(ImageView)findViewById(R.id.imageView);
imageView.setImageBitmap(myBitmap);
}
小开

您可以使用它来访问特定的文件夹并获得特定的图像

 public void Retrieve(String path, String Name)
{
File imageFile = new File(path+Name);


if(imageFile.exists()){


Bitmap myBitmap = BitmapFactory.decodeFile(path+Name);
myImage = (ImageView) findViewById(R.id.savedImage);
myImage.setImageBitmap(myBitmap);
Toast.makeText(SaveImage.this, myBitmap.toString(), Toast.LENGTH_LONG).show();


}
}

然后你就可以过来了

Retrieve(Environment.getExternalStorageDirectory().toString()+"/Aqeel/Images/","Image2.PNG");
Toast.makeText(SaveImage.this, "Saved", Toast.LENGTH_LONG).show();
小开

你可以使用:

ImageView imgView = new ImageView(this);
InputStream is = getClass().getResourceAsStream("/drawable/" + fileName);
imgView.setImageDrawable(Drawable.createFromStream(is, ""));
小开 
mageView.setImageResource(R.id.img);
小开 
       public static Bitmap decodeFile(String path) {
Bitmap b = null;
File f = new File(path);
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;


FileInputStream fis = null;
try {
fis = new FileInputStream(f);
BitmapFactory.decodeStream(fis, null, o);
fis.close();


int IMAGE_MAX_SIZE = 1024; // maximum dimension limit
int scale = 1;
if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) {
scale = (int) Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
}


// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;


fis = new FileInputStream(f);
b = BitmapFactory.decodeStream(fis, null, o2);
fis.close();


} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


return b;
}


public static Bitmap showBitmapFromFile(String file_path)
{
try {
File imgFile = new  File(file_path);
if(imgFile.exists()){


Bitmap pic_Bitmap = decodeFile(file_path);
return pic_Bitmap;


}
} catch (Exception e) {
MyLog.e("Exception showBitmapFromFile");
return null;
}
return null;
}

如果你在列表视图中使用图像加载，那么使用Aquery概念。

https://github.com/AshishPsaini/AqueryExample

     AQuery  aq= new AQuery((Activity) activity, convertView);
//load image from file, down sample to target width of 250 pixels .gi
File file=new File("//pic/path/here/aaaa.jpg");
if(aq!=null)
aq.id(holder.pic_imageview).image(file, 250);
小开

所有的答案都过时了。最好使用毕加索来实现这样的目的。它有很多功能，包括背景图像处理。

我有没有提过它非常容易使用:

Picasso.with(context).load(new File(...)).into(imageView);
小开

来自官方网站:http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

ImageView image = (ImageView) findViewById(R.id.imagePreview);
try {
image.setImageBitmap(decodeSampledBitmap(picFilename));
} catch (Exception e) {
e.printStackTrace();
}

方法如下:

    private int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;


if (height > reqHeight || width > reqWidth) {


final int halfHeight = height / 2;
final int halfWidth = width / 2;


// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}


return inSampleSize;
}


private Bitmap decodeSampledBitmap(String pathName,
int reqWidth, int reqHeight) {


// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(pathName, options);


// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);


// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(pathName, options);
}


//I added this to have a good approximation of the screen size:
private Bitmap decodeSampledBitmap(String pathName) {
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
return decodeSampledBitmap(pathName, width, height);
}
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onLoadImage满载

private void onLoadImage(final String imagePath) {
ImageSize targetSize = new ImageSize(imageView.getWidth(), imageView.getHeight()); // result Bitmap will be fit to this size


//ImageLoader imageLoader = ImageLoader.getInstance(); // Get singleto
com.nostra13.universalimageloader.core.ImageLoader imageLoader = com.nostra13.universalimageloader.core.ImageLoader.getInstance();
imageLoader.init(ImageLoaderConfiguration.createDefault(getContext()));


imageLoader.loadImage(imagePath, targetSize, new SimpleImageLoadingListener() {
@Override
public void onLoadingStarted(final String imageUri, View view) {
super.onLoadingStarted(imageUri, view);


progress2.setVisibility(View.VISIBLE);


new Handler().post(new Runnable() {
public void run() {
progress2.setColorSchemeResources(android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light);


// Picasso.with(getContext()).load(imagePath).into(imageView);
// Picasso.with(getContext()).load(imagePath) .memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE).into(imageView);


Glide.with(getContext())
.load(imagePath)
.asBitmap()
.into(imageView);
}
});
}


@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
if (view == null) {
progress2.setVisibility(View.INVISIBLE);
}
// else {
Log.e("onLoadImage", "onLoadingComplete");
//   progress2.setVisibility(View.INVISIBLE);
// }
// setLoagingCompileImage();
}


@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
super.onLoadingFailed(imageUri, view, failReason);
if (view == null) {
progress2.setVisibility(View.INVISIBLE);
}
Log.e("onLoadingFailed", imageUri);
Log.e("onLoadingFailed", failReason.toString());
}


@Override
public void onLoadingCancelled(String imageUri, View view) {
super.onLoadingCancelled(imageUri, view);
if (view == null) {
progress2.setVisibility(View.INVISIBLE);
}
Log.e("onLoadImage", "onLoadingCancelled");
}
});
}
小开

如何显示图像从文件夹路径在Android

首先:确保你有添加权限到Mainfest文件:

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

:创建一个类MyGallery

public class MyGallery extends Activity {




private GridView gridView;
private String _location;


private String newFolder = "/IslamicGif/";
private String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
private AdView mAdView;
private ArrayList<Bitmap> photo = new ArrayList<Bitmap>();
public static String[] imageFileList;
TextView gallerytxt;


public static ImageAdapter imageAdapter;


protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.mygallery);
/*if (MenuClass.mInterstitialAd.isLoaded()) {
MenuClass.mInterstitialAd.show();
}*/


gallerytxt = (TextView) findViewById(R.id.gallerytxt);
/*gallerytxt.setTextSize(20);
int[] color = {Color.YELLOW,Color.WHITE};
float[] position = {0, 1};
Shader.TileMode tile_mode0= Shader.TileMode.REPEAT; // or TileMode.REPEAT;
LinearGradient lin_grad0 = new LinearGradient(0, 0, 0, 200,color,position, tile_mode0);
Shader shader_gradient0 = lin_grad0;
gallerytxt.getPaint().setShader(shader_gradient0);*/
ImageButton btn_back = (ImageButton) findViewById(R.id.btn_back);
btn_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
MyGallery.this.finish();
}
});




mAdView = (AdView) findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder()
.build();
mAdView.loadAd(adRequest);
gridView = (GridView) findViewById(R.id.gridView);


new MyGalleryAsy().execute();


gridView.setOnItemClickListener(new OnItemClickListener() {


@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
// TODO Auto-generated method stub
Intent intent = new Intent(MyGallery.this, ImageDetail.class);
intent.putExtra("ImgUrl", imageFileList[pos]);


//Toast.makeText(MyGallery.this,"image detail"+pos,Toast.LENGTH_LONG).show();
startActivity(intent);
}
});




}


protected void onStart() {
super.onStart();
if (ImageDetail.deleted) {
photo = new ArrayList<Bitmap>();
new MyGalleryAsy().execute();
ImageDetail.deleted = false;
}


}


public class MyGalleryAsy extends AsyncTask<Void, Void, Void> {
private ProgressDialog dialog;
Bitmap mBitmap;


@Override
protected void onPreExecute() {
dialog = ProgressDialog.show(MyGallery.this, "", "Loading ...", true);
dialog.show();
}


@Override
protected Void doInBackground(Void... arg0) {


readImage();
return null;
}


@Override
protected void onPostExecute(Void result) {


dialog.dismiss();
DisplayMetrics displayMatrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMatrics);
int screenWidth = displayMatrics.widthPixels / 3;


if (photo.size() > 0) {
imageAdapter = new ImageAdapter(MyGallery.this, screenWidth);
gridView.setAdapter(imageAdapter);
}


}


}




private void readImage() {
// TODO Auto-generated method stub




try {
if (isSdPresent()) {
_location = extStorageDirectory + newFolder;
} else
_location = getFilesDir() + newFolder;
File file1 = new File(_location);


if (file1.isDirectory()) { // sdCard == true
imageFileList = file1.list();
if (imageFileList != null) {
for (int i = 0; i < imageFileList.length; i++) {
try {
photo.add(BitmapFactory.decodeFile(_location + imageFileList[i].trim()));
} catch (Exception e) {
// TODO: handle exception
//Toast.makeText(getApplicationContext(), e.toString(),Toast.LENGTH_LONG).show();
}
}
}
}
} catch (Exception e) {
// TODO: handle exception
}
}


public static boolean isSdPresent() {
return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
}


public class ImageAdapter extends BaseAdapter {


private Context context;
private LayoutInflater layoutInflater;
private int width;
private int mGalleryItemBackground;


public ImageAdapter(Context c) {
context = c;


}


public ImageAdapter(Context c, int width) {
context = c;
this.width = width;
}


public int getCount() {
return photo.size();
}


public Object getItem(int position) {
return null;
}


public long getItemId(int position) {
return 0;
}


public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = layoutInflater.inflate(R.layout.galleryadapter, null);


RelativeLayout layout = (RelativeLayout) v.findViewById(R.id.galleryLayout);


ImageView imageView = new ImageView(context);
layout.addView(imageView, new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, width));
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
layout.setLayoutParams(new GridView.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, width));
imageView.setImageBitmap(photo.get(position));


return v;


}


public void updateItemList(ArrayList<Bitmap> newItemList) {
photo = newItemList;
notifyDataSetChanged();
}
}




}

现在创建它的Xml类

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg"
android:orientation="vertical">


<RelativeLayout
android:id="@+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="@color/colorPrimary"
android:minHeight="?attr/actionBarSize">


<TextView
android:id="@+id/gallerytxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_gravity="center"
android:fontFamily="@string/font_fontFamily_medium"
android:text="My Gallery"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@android:color/black"
android:textStyle="bold" />


<ImageButton
android:id="@+id/btn_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginLeft="12dp"
android:background="@drawable/ic_arrow_back_black_24dp" />
</RelativeLayout>




<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_gravity="center|bottom"
android:visibility="gone"
ads:adSize="BANNER"
ads:adUnitId="@string/banner_id" />


<GridView
android:id="@+id/gridView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/adView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/relativeLayout"
android:horizontalSpacing="5dp"
android:numColumns="2"
android:smoothScrollbar="true"
android:verticalSpacing="5dp"></GridView>
##将适配器设置为galleryadapter.xml ## 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:id="@+id/galleryLayout"
android:padding="2dp">
[![enter image description here][1]][1]

为了查看图像的详细信息，创建一个新的类ImageDetail:##

 public class ImageDetail extends Activity implements OnClickListener {
public static InterstitialAd mInterstitialAd;
private ImageView mainImageView;
private LinearLayout menuTop;
private TableLayout menuBottom;
private Boolean onOff = true;
private ImageView delButton, mailButton, shareButton;


private String imgUrl = null;
private AdView mAdView;
TextView titletxt;
private String newFolder = "/IslamicGif/";
private String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
public static boolean deleted = false;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.image_detail);


mAdView = (AdView) findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder()
.build();
mAdView.loadAd(adRequest);
mAdView.setAdListener(new AdListener() {
@Override
public void onAdLoaded() {
mAdView.setVisibility(View.VISIBLE);
}
});
mainImageView = (ImageView) findViewById(R.id.mainImageView);
menuTop = (LinearLayout) findViewById(R.id.menuTop);
menuBottom = (TableLayout) findViewById(R.id.menuBottom);
titletxt = (TextView) findViewById(R.id.titletxt);
titletxt.setTextSize(22);
mInterstitialAd = new InterstitialAd(this);
mInterstitialAd.setAdUnitId(getString(R.string.interstial_id));


mInterstitialAd.setAdListener(new AdListener() {
@Override
public void onAdClosed() {
requestNewInterstitial();


}
});
requestNewInterstitial();
delButton = (ImageView) findViewById(R.id.delButton);
mailButton = (ImageView) findViewById(R.id.mailButton);
shareButton = (ImageView) findViewById(R.id.shareButton);


Bundle exBundle = getIntent().getExtras();
if (exBundle != null) {
imgUrl = exBundle.getString("ImgUrl");
}
if (isSdPresent()) {
imgUrl = extStorageDirectory + newFolder + imgUrl;
} else
imgUrl = getFilesDir() + newFolder + imgUrl;


if (imgUrl != null) {
GlideDrawableImageViewTarget imageViewTarget = new GlideDrawableImageViewTarget(mainImageView);
Glide.with(this).load(imgUrl).into(imageViewTarget);


}




delButton.setOnClickListener(this);
mailButton.setOnClickListener(this);
shareButton.setOnClickListener(this);




}


public static boolean isSdPresent() {
return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
}




@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
switch (arg0.getId()) {
case R.id.shareButton:
Image_Link();
break;
case R.id.delButton:
deleted();
break;
case R.id.mailButton:
sendemail();
break;
default:
break;
}
}


private void sendemail() {


try {


File photo = new File(imgUrl);
Uri imageuri = Uri.fromFile(photo);




String url = Constant.AppUrl;


SpannableStringBuilder builder = new SpannableStringBuilder();
builder.append("Face Placer App Available here..Play Link");
int start = builder.length();
builder.append(url);
int end = builder.length();


builder.setSpan(new URLSpan(url), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);


Intent emailIntent2 = new Intent(Intent.ACTION_SEND);
String[] recipients2 = new String[]{"mymail@email.com", "",};
emailIntent2.putExtra(Intent.EXTRA_EMAIL, recipients2);
emailIntent2.putExtra(Intent.EXTRA_SUBJECT, "Sample mail");
emailIntent2.putExtra(Intent.EXTRA_STREAM, imageuri);
emailIntent2.putExtra(Intent.EXTRA_TEXT, builder);
emailIntent2.setType("text/html");
emailIntent2.setType("image/JPEG");
startActivity(Intent.createChooser(emailIntent2, "Send mail client :"));


} catch (Exception e) {
// TODO: handle exception


Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
}




private void Image_Link() {


try {


File photo = new File(imgUrl);
Uri imageuri = Uri.fromFile(photo);




String url = Constant.AppUrl;


SpannableStringBuilder builder = new SpannableStringBuilder();
builder.append("Face Placer App Available here..Play Link");
int start = builder.length();
builder.append(url);
int end = builder.length();


builder.setSpan(new URLSpan(url), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);


Intent emailIntent2 = new Intent(Intent.ACTION_SEND);
String[] recipients2 = new String[]{"mymail@email.com", "",};
emailIntent2.putExtra(Intent.EXTRA_EMAIL, recipients2);
emailIntent2.putExtra(Intent.EXTRA_SUBJECT, "Sample mail");
emailIntent2.putExtra(Intent.EXTRA_STREAM, imageuri);
emailIntent2.putExtra(Intent.EXTRA_TEXT, builder);
emailIntent2.setType("text/html");
emailIntent2.putExtra(Intent.EXTRA_TEXT, "Face Placer App Available here..Play Link " + url);
emailIntent2.setType("image/JPEG");
startActivity(Intent.createChooser(emailIntent2, "Send mail client :"));


} catch (Exception e) {
// TODO: handle exception


Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
}




private void deleted() {
if (mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
}


AlertDialog.Builder builder = new AlertDialog.Builder(ImageDetail.this);
builder.setTitle(getString(R.string.removeoption));
builder.setMessage(getString(R.string.deleteimage));
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User clicked OK button
dialog.cancel();
File fileDel = new File(imgUrl);
boolean isCheck1 = fileDel.delete();


if (isCheck1) {
deleted = true;
finish();
MyGallery.imageAdapter.notifyDataSetChanged();


} else {
Toast.makeText(getApplicationContext(), "error", Toast.LENGTH_LONG).show();
}
}
});


builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User clicked OK button
dialog.cancel();


}
});
Dialog dialog = builder.create();
dialog.show();




}




private boolean isNetworkConnected() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo ni = cm.getActiveNetworkInfo();
if (ni == null) {
// There are no active networks.
return false;
} else
return true;
}


private void requestNewInterstitial() {
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice("SEE_YOUR_LOGCAT_TO_GET_YOUR_DEVICE_ID")
.build();


mInterstitialAd.loadAd(adRequest);
}


}

创建它的xml image_detail.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/bg"
android:orientation="vertical">


<ImageView
android:id="@+id/mainImageView"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:contentDescription="@string/app_name"
android:focusable="true"
android:focusableInTouchMode="true" />


<LinearLayout
android:id="@+id/adlayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:orientation="horizontal"
android:visibility="gone"></LinearLayout>


<LinearLayout
android:id="@+id/menuTop"
android:layout_width="fill_parent"
android:layout_height="56dp"
android:layout_alignWithParentIfMissing="true"
android:layout_below="@+id/adlayout"
android:background="@color/colorPrimary"
android:orientation="vertical"
android:padding="10.0dip"
android:visibility="visible">


<TextView
android:id="@+id/titletxt"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Islamic Gifs"
android:textColor="#000000"
android:textSize="22sp"
android:textStyle="bold" />
</LinearLayout>


<TableLayout
android:id="@+id/menuBottom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="@color/colorPrimary"
android:padding="10.0dip"
android:stretchColumns="*"
android:visibility="visible">


<TableRow>


<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal">


<ImageView
android:id="@+id/mailButton"
android:layout_width="52dp"
android:layout_height="52dp"
android:background="@drawable/selector_shareimage"
android:contentDescription="@string/app_name" />
</LinearLayout>


<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal">


<ImageView
android:id="@+id/shareButton"
android:layout_width="52dp"
android:layout_height="52dp"
android:background="@drawable/selector_shareimage_small"
android:contentDescription="@string/app_name" />
</LinearLayout>


<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal">


<ImageView
android:id="@+id/delButton"
android:layout_width="52dp"
android:layout_height="52dp"
android:background="@drawable/selector_delete"
android:contentDescription="@string/app_name" />
</LinearLayout>
</TableRow>
</TableLayout>


<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/menuTop"
android:layout_centerHorizontal="true"
android:visibility="gone"
ads:adSize="BANNER"
ads:adUnitId="@string/banner_id"></com.google.android.gms.ads.AdView>

将您自己的Drawable添加到Selector类，并创建它res>drawable>selector_shareimage.xml

<?xml version="1.0" encoding="utf-8"?>

<item android:drawable="@drawable/result_bt_mail" android:state_enabled="true" android:state_pressed="true"/>
<item android:drawable="@drawable/result_bt_mail" android:state_enabled="true" android:state_focused="true"/>
<item android:drawable="@drawable/result_bt_mail" android:state_enabled="true" android:state_selected="true"/>
<item android:drawable="@drawable/result_bt_mail_s"/>

enter image description here

不要忘记在sdk版本29和30 legacy的应用程序标签中添加这一行

android: requestLegacyExternalStorage =“true"

 <application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:requestLegacyExternalStorage="true"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
小开 
private void showImage(ImageView img, String absolutePath) {
  

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
Bitmap bitmapPicture = BitmapFactory.decodeFile(absolutePath);
img.setImageBitmap(bitmapPicture);


}
小开

大多数答案都是有效的，但没有人提到高分辨率的图像会降低应用程序的速度，在我的情况下，我使用了imagesrecyclerview，它在30张图像中占用了0.9 GB的设备内存。

I/编舞:跳过73帧!应用程序可能也在这样做

解决方案很简单，你可以像这样降低质量:降低位图分辨率

但我用简单的方式，Glide处理剩下的工作

fanContext?.let {
Glide.with(it)
.load(Uri.fromFile(File(item.filePath)))
.into(viewHolder.imagePreview)
}
小开

使用位图可以很容易地做到这一点。你可以在下面找到代码:

ImageView imageView=findViewById(R.id.imageView);


Bitmap bitMapImage= BitmapFactory.decodeFile("write path of your image");


imageView.setImageBitmap(bitMapImage);

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