Android ViewFilgger+GestrueDetector用手势实现滑动

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left_in:<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"    android:fillAfter="true"    android:duration="1000"    >    <translate        android:fromXDelta="-100%p"        android:toXDelta="0"        >    </translate><rotate    android:fromDegrees="0"    android:toDegrees="360"    android:pivotX="50%"    android:pivotY="50%"    ></rotate></set>

left_out:
<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"    android:fillAfter="true"    android:duration="1000"    ><translate    android:fromXDelta="0"    android:toXDelta="-100%p"    ></translate>    <rotate        android:fromDegrees="0"        android:toDegrees="-360"        android:pivotX="50%"        android:pivotY="50%"        >    </rotate></set>
right_in:<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"    android:fillAfter="true"    android:duration="1000"    >    <translate        android:fromXDelta="100%p"        android:toXDelta="0"        >    </translate><rotate    android:fromDegrees="0"    android:toDegrees="-360"    android:pivotX="50%"    android:pivotY="50%"    ></rotate></set>
right_out:<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"    android:fillAfter="true"    android:duration="1000"    ><translate    android:fromXDelta="0"    android:toXDelta="100%p"    ></translate>    <rotate        android:fromDegrees="0"        android:toDegrees="360"        android:pivotX="50%"        android:pivotY="50%"        >    </rotate></set>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.zking.y2_android20_gestrue.MainActivity"> <ViewFlipper android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/vf_main_image" > </ViewFlipper></LinearLayout>
public class MainActivity extends AppCompatActivity {    private ViewFlipper viewFlipper;    private int []images={R.drawable.image2,R.drawable.image3,R.drawable.image4};    private GestureDetector gd;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //ViewFlipper容器用来装图片        viewFlipper = (ViewFlipper) findViewById(R.id.vf_main_image);        for (int i = 0; i < images.length; i++) {            ImageView iv=new ImageView(this);            iv.setImageResource(images[i]);            viewFlipper.addView(iv);        }        //实例化一个手势检测器的类        gd = new GestureDetector(this, new GestureDetector.OnGestureListener() {            @Override            public boolean onDown(MotionEvent motionEvent) {                Log.i("test","按下:onDown");                return false;            }            @Override            public void onShowPress(MotionEvent motionEvent) {                Log.i("test","按下但还未抬起:onShowPress");            }            @Override            public boolean onSingleTapUp(MotionEvent motionEvent) {                Log.i("test","按一下，立即抬起:onSingleTapUp");                return false;            }            @Override            public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {                Log.i("test","滚动:onScroll");                return false;            }            @Override            public void onLongPress(MotionEvent motionEvent) {                Log.i("test","长时间按下：onLongPress");            }            @Override            public boolean onFling(MotionEvent e1, MotionEvent e2, float v, float v1) {                Log.i("test","拖动：onFling");                if(e2.getX()-e1.getX()>200){                    Toast.makeText(MainActivity.this, "右滑，上一张", Toast.LENGTH_SHORT).show();                    viewFlipper.showPrevious();                    //左进右出                    viewFlipper.setInAnimation(MainActivity.this,R.anim.left_in);                    viewFlipper.setOutAnimation(MainActivity.this,R.anim.right_out);                }                if(e1.getX()-e2.getX()>200){                    Toast.makeText(MainActivity.this, "左滑，下一张", Toast.LENGTH_SHORT).show();                    viewFlipper.showNext();                    //左出右进                    viewFlipper.setInAnimation(MainActivity.this,R.anim.right_in);                    viewFlipper.setOutAnimation(MainActivity.this,R.anim.left_out);                }                return false;            }        });    }    @Override    public boolean onTouchEvent(MotionEvent event) {        return gd.onTouchEvent(event);    }}
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