处理 EditText 焦点的事件

下面是焦点侦听器示例。

editText.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if (hasFocus) {
Toast.makeText(getApplicationContext(), "Got the focus", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "Lost the focus", Toast.LENGTH_LONG).show();
}
}
});

对于我们这些谁上述有效的解决方案没有工作，有另一个工作在这里

 searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean isFocused) {
if(!isFocused)
{
Toast.makeText(MainActivity.this,"not focused",Toast.LENGTH_SHORT).show();


}
}
});

1. 在类的顶部声明 EditText 对象:

   EditText myEditText;
   

2. 在 onCreate 函数和 EditText 的 setOnFocusChangeListener 中查找 EditText:

   myEditText = findViewById(R.id.yourEditTextNameInxml);
   
   
   myEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
   @Override
   public void onFocusChange(View view, boolean hasFocus) {
   if (!hasFocus) {
   Toast.makeText(this, "Focus Lose", Toast.LENGTH_SHORT).show();
   }else{
   Toast.makeText(this, "Get Focus", Toast.LENGTH_SHORT).show();
   }
   
   
   }
   });
   

很好用。

在 Kotlin，情况会是这样的:

editText.setOnFocusChangeListener { _, hasFocus ->
if (hasFocus) {
toast("focused")
} else {
toast("focuse lose")
}
}