如何使一个应用程序's背景图像重复

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最佳答案

好吧，这是我在我的应用程序中得到的东西。它包括一个黑客，以防止ListViews在滚动时变黑。

可拉的/ app_background.xml:

<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:src="@drawable/actual_pattern_image"
android:tileMode="repeat" />

值/ styles.xml:

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


<style name="app_theme" parent="android:Theme">
<item name="android:windowBackground">@drawable/app_background</item>
<item name="android:listViewStyle">@style/TransparentListView</item>
<item name="android:expandableListViewStyle">@style/TransparentExpandableListView</item>
</style>


<style name="TransparentListView" parent="@android:style/Widget.ListView">
<item name="android:cacheColorHint">@android:color/transparent</item>
</style>


<style name="TransparentExpandableListView" parent="@android:style/Widget.ExpandableListView">
<item name="android:cacheColorHint">@android:color/transparent</item>
</style>


</resources>

AndroidManifest.xml:

//
<application android:theme="@style/app_theme">
//

小开

这是一个纯java实现的背景图像重复:

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.bg_image);
BitmapDrawable bitmapDrawable = new BitmapDrawable(bmp);
bitmapDrawable.setTileModeXY(Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
LinearLayout layout = new LinearLayout(this);
layout.setBackgroundDrawable(bitmapDrawable);
}

在这种情况下，我们的背景图像必须存储在res/drawable/bg_image.png中。

小开

在可绘制xml中有一个属性可以做到这一点。 android: tileMode = "重复" < / p >

查看这个网站: http://androidforbeginners.blogspot.com/2010/06/how-to-tile-background-image-in-android.html < / p >

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// Prepared By Muhammad Mubashir.
// 26, August, 2011.
// Chnage Back Ground Image of Activity.


package com.ChangeBg_01;


import com.ChangeBg_01.R;


import android.R.color;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;


public class ChangeBg_01Activity extends Activity
{
TextView tv;
int[] arr = new int[2];
int i=0;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);


tv = (TextView)findViewById(R.id.tv);
arr[0] = R.drawable.icon1;
arr[1] = R.drawable.icon;


// Load a background for the current screen from a drawable resource
//getWindow().setBackgroundDrawableResource(R.drawable.icon1) ;


final Handler handler=new Handler();
final Runnable r = new Runnable()
{
public void run()
{
//tv.append("Hello World");
if(i== 2){
i=0;
}


getWindow().setBackgroundDrawableResource(arr[i]);
handler.postDelayed(this, 1000);
i++;
}
};


handler.postDelayed(r, 1000);
Thread thread = new Thread()
{
@Override
public void run() {
try {
while(true)
{
if(i== 2){
//finish();
i=0;
}
sleep(1000);
handler.post(r);
//i++;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};




}
}


/*android:background="#FFFFFF"*/
/*
ImageView imageView = (ImageView) findViewById(R.layout.main);
imageView.setImageResource(R.drawable.icon);*/


// Now get a handle to any View contained
// within the main layout you are using
/*        View someView = (View)findViewById(R.layout.main);


// Find the root view
View root = someView.getRootView();*/


// Set the color
/*root.setBackgroundColor(color.darker_gray);*/

小开

扩展plowman的答案，下面是用java更改背景图像的非弃用版本。

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bitmap bmp = BitmapFactory.decodeResource(getResources(),
R.drawable.texture);
BitmapDrawable bitmapDrawable = new BitmapDrawable(getResources(),bmp);
bitmapDrawable.setTileModeXY(Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);
setBackground(bitmapDrawable);
}