放大缩小动画

Question

我正在测试单击图像时放大/缩小动画。但是我没有得到我想要的结果。图像完全放大，但不完全缩小。为了更好地理解我的问题，请参阅this video。

这里是我的代码：

zoom_in.XML

<set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true" > 
<scale 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:duration="1000" 
    android:fromXScale="1" 
    android:fromYScale="1" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:toXScale="3" 
    android:toYScale="3" > 
</scale> 
</set> 

zoom_out.xml

<set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true" > 
<scale 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:duration="1000" 
    android:fromXScale="1.0" 
    android:fromYScale="1.0" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:toXScale="0.5" 
    android:toYScale="0.5" > 
</scale> 

mainacti VITY

public class MainActivity extends Activity 
{ 
@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    ImageButton pic = (ImageButton) findViewById(R.id.levelimg); 
    pic.setOnClickListener(new OnClickListener(){ 
     @Override 
     public void onClick(View v){ 
      final Dialog dialog = new Dialog(MainActivity.this); 
      dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
      dialog.setContentView(R.layout.dialogpic); 
      dialog.getWindow().getAttributes().windowAnimations = R.style.DialogAnimation; 
      dialog.show(); 
     } 
    }); 
} 
    } 

我dailog动画风格

<style name="DialogAnimation"> 
    <item name="android:windowEnterAnimation">@anim/zoom_in</item> 
    <item name="android:windowExitAnimation">@anim/zoom_out</item> 
    </style> 

Answer 1

更改您的缩放列如下代码，并检查一次，让我，如果它不能正常工作。

<set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true" > 

     <scale 
      xmlns:android="http://schemas.android.com/apk/res/android" 
      android:duration=" 

1000" 
     android:fromXScale="1.0" 
     android:fromYScale="1.0" 
     android:pivotX="50%" 
     android:pivotY="50%" 
     android:toXScale="0" 
     android:toYScale="0" > 
    </scale> 

Answer 2

用这个改变你的代码。

zoom_in.xml

<scale 
    android:duration="@android:integer/config_shortAnimTime" 
    android:fromXScale="0.3" 
    android:fromYScale="0.3" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:toXScale="1.0" 
    android:toYScale="1.0" /> 

zoom_out.xml

<scale 
    android:duration="@android:integer/config_shortAnimTime" 
    android:fromXScale="1.0" 
    android:fromYScale="1.0" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:toXScale="0" 
    android:toYScale="0" /> 

这将为你做的伎俩。 :)

Answer 3

试试这个

public class MainActivity extends Activity { 
    private ImageView iv; 
    private Matrix matrix = new Matrix(); 
    private float scale = 1f; 
    private ScaleGestureDetector SGD; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     iv=(ImageView)findViewById(R.id.imageView); 
     SGD = new ScaleGestureDetector(this,new ScaleListener()); 
    } 

    public boolean onTouchEvent(MotionEvent ev) { 
     SGD.onTouchEvent(ev); 
     return true; 
    } 

    private class ScaleListener extends ScaleGestureDetector. 

    SimpleOnScaleGestureListener { 
     @Override 
     public boolean onScale(ScaleGestureDetector detector) { 
     scale *= detector.getScaleFactor(); 
     scale = Math.max(0.1f, Math.min(scale, 5.0f)); 

     matrix.setScale(scale, scale); 
     iv.setImageMatrix(matrix); 
     return true; 
     } 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 

     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
     return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
}