Android：无法翻转

Question

我编写了一个应用程序，用户点击一个ImageView时，它会翻到另一边。开始时，imgFront将显示。一旦用户点击，imgBack应该与imgFront显示在同一个轴上。但是，它不会发生，但我的应用程序能够顺利运行。任何想法是什么问题？

的Java：

import android.animation.AnimatorInflater; 
import android.animation.AnimatorSet; 
import android.media.Image; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageView; 

public class MainActivity extends AppCompatActivity implements View.OnClickListener { 

ImageView imgFront; 
ImageView imgBack; 
ImageView imageView3; 
ImageView imageView4; 

boolean isBackVisible = false; // Boolean variable to check if the back image is visible currently 

AnimatorSet setRightOut; 
AnimatorSet setLeftIn; 

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

    setRightOut = (AnimatorSet) AnimatorInflater.loadAnimator(getApplicationContext(), R.animator.flight_right_out); 
    setLeftIn = (AnimatorSet) AnimatorInflater.loadAnimator(getApplicationContext(), R.animator.flight_left_in); 

    imgFront = (ImageView) findViewById(R.id.imgFront); 
    imgFront.setOnClickListener(this); 

    imgBack = (ImageView) findViewById(R.id.imgBack); 
    imgBack.setOnClickListener(this); 

    imageView3 = (ImageView) findViewById(R.id.imageView3); 
    imageView3.setOnClickListener(this); 

    imageView4 = (ImageView) findViewById(R.id.imageView4); 
    imageView4.setOnClickListener(this); 





} 

@Override 
public void onClick(View view) { 
    switch (view.getId()) { 
     case R.id.imgFront: 
      if (!isBackVisible) { 
       setRightOut.setTarget(this.imgFront); 
       setLeftIn.setTarget(this.imgBack); 
       setRightOut.start(); 
       setLeftIn.start(); 
       isBackVisible = true; 
      } else { 
       setRightOut.setTarget(this.imgBack); 
       setLeftIn.setTarget(this.imgFront); 
       setRightOut.start(); 
       setLeftIn.start(); 
       isBackVisible = false; 
      } 
      break; 
     case R.id.imageView3: 
      if (!isBackVisible) { 
       setRightOut.setTarget(this.imageView3); 
       setLeftIn.setTarget(this.imageView4); 
       setRightOut.start(); 
       setLeftIn.start(); 
       isBackVisible = true; 
      } else { 
       setRightOut.setTarget(this.imageView4); 
       setLeftIn.setTarget(this.imageView3); 
       setRightOut.start(); 
       setLeftIn.start(); 
       isBackVisible = false; 
      } 
      break; 
    } 
} 

@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); 
} 
} 

Activity.xml：

<RelativeLayout 
    android:layout_width="90dp" 
    android:layout_height="90dp" 
    android:layout_marginTop="80dp" 
    android:clickable="false"> 

    <ImageView 
    android:id="@+id/imgFront" 
    android:layout_width="90dp" 
    android:layout_height="90dp" 
    android:src="@drawable/front" 
    android:layout_alignTop="@+id/imgBack" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentStart="true" 
     android:contentDescription="@string/imgFront" 
     android:clickable="false" /> 

    <ImageView 
    android:id="@+id/imgBack" 
    android:layout_width="90dp" 
    android:layout_height="90dp" 
    android:alpha="0" 
    android:src="@drawable/back" 
     android:layout_alignParentTop="true" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentStart="true" 
     android:contentDescription="@string/imgBack" 
     android:clickable="false" /> 

</RelativeLayout> 

<RelativeLayout 
    android:layout_width="90dp" 
    android:layout_height="90dp" 
    android:layout_marginTop="80dp" 
    android:layout_marginLeft="130dp" 
    android:clickable="false"> 

    <ImageView 
     android:id="@+id/imageView3" 
     android:layout_width="90dp" 
     android:layout_height="90dp" 
     android:src="@drawable/front" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:contentDescription="@string/imgFront3" 
     android:clickable="false" /> 

    <ImageView 
     android:id="@+id/imageView4" 
     android:layout_width="90dp" 
     android:layout_height="90dp" 
     android:alpha="0" 
     android:src="@drawable/back" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:contentDescription="imgBack3" 
     android:clickable="false" /> 
</RelativeLayout> 

Answer 1

该代码尼斯的努力，但请看看我的图书馆刚刚开发FlipView包括基本翻转动画并延伸ViewFlipper。我的意思是一个完全可定制的库，你可以用任何形式的动画和形状来交换任何类型的视图和布局（以及更多），包括Gmail图像翻转。