Android(安卓)自定义Animation，使用Camera对View组件作三维变换

layout 布局

<?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="shortcut.song.com.myapplication.ListViewTweenActivity">    <ListView        android:id="@+id/id_list_3d"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:entries="@array/books"/>LinearLayout>

自定义的Animation

package shortcut.song.com.myapplication;import android.graphics.Camera;import android.graphics.Matrix;import android.view.animation.Animation;import android.view.animation.LinearInterpolator;import android.view.animation.Transformation;/** * Created by Administrator on 2017/8/1 0001. */public class MyAnimation extends Animation {    private float centerX;    private float centerY;    //定义动画的持续时间    private int duration;    private Camera camera = new Camera();    public MyAnimation(float x, float y, int duration)    {        this.centerX = x;        this.centerY = y;        this.duration = duration;    }    @Override    public void initialize(int width, int height, int parentWidth, int parentHeight) {        super.initialize(width, height, parentWidth, parentHeight);        setDuration(duration);//设置动画的持续时间        setFillAfter(true); //设置动画结束后效果        setInterpolator(new LinearInterpolator());    }    /*    *   interpolatedTime:代表了抽象的动画持续时间，不管动画实际持续多长时间，interpolatedTime参数总是从0（动画开始时）变化到1（动画结束时）    *   Transformation:代表了对目标组件所做的改变    *     */    @Override    protected void applyTransformation(float interpolatedTime, Transformation t) {        super.applyTransformation(interpolatedTime, t);        camera.save();        //根据interpolateTime时间来控制X,Y,Z上的偏移        camera.translate(100.0f - 100.0f * interpolatedTime, 150.0f * interpolatedTime - 150, 80.0f - 80.0f * interpolatedTime );        //根据interpolateTime时间在Y轴上旋转不同角度        camera.rotateY(360 * (interpolatedTime));        //根据interpolateTime时间在X轴上旋转不同角度        camera.rotateX(360 * (interpolatedTime));        //获取Transformation的Matrix参数        Matrix matrix = t.getMatrix();        camera.getMatrix(matrix);        matrix.preTranslate(-centerX, -centerY);        matrix.postTranslate(centerX, centerY);        camera.restore();    }}

package shortcut.song.com.myapplication;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.DisplayMetrics;import android.view.Display;import android.view.WindowManager;import android.widget.ListView;public class ListViewTweenActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_list_view_tween);        ListView listView = (ListView)findViewById(R.id.id_list_3d);        WindowManager windowManager = (WindowManager)getSystemService(WINDOW_SERVICE);        Display display = windowManager.getDefaultDisplay();        DisplayMetrics  metrics = new DisplayMetrics();        display.getMetrics(metrics);        //设置对ListView组件应用动画        listView.startAnimation(new MyAnimation(metrics.xdpi / 2, metrics.ydpi / 2, 3500));    }}

layout 布局

自定义的Animation

运行效果：

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