使用ViewFlipper实现图片轮播
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | public class MainActivity extends AppCompatActivity { private ViewFlipper flipper; //背景图片int[] id private int [] resID = {R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4}; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); flipper = (ViewFlipper) findViewById(R.id.flipper); //动态导入的方式为ViewFlipper加入子View for ( int i = 0 ; i < resID.length ; i++){ flipper.addView(getimageview(resID[i])); } //为ViewFlipper去添加动画效果 flipper.setInAnimation( this ,R.anim.right_in); flipper.setOutAnimation( this ,R.anim.right_out); //切换间隔时间 flipper.setFlipInterval( 3000 ); //开始播放 flipper.startFlipping(); } private ImageView getimageview( int resID){ ImageView image = new ImageView( this ); image.setBackgroundResource(resID); return image; } |
手指滑动
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | public class MainActivity extends AppCompatActivity { private ViewFlipper flipper; //X横坐标 private float startX; //背景图片int[] id private int [] resID = {R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4}; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); flipper = (ViewFlipper) findViewById(R.id.flipper); //动态导入的方式为ViewFlipper加入子View for ( int i = 0 ; i < resID.length ; i++){ flipper.addView(getimageview(resID[i])); } } private ImageView getimageview( int resID){ ImageView image = new ImageView( this ); image.setBackgroundResource(resID); return image; } //手指滑动 @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()){ case MotionEvent.ACTION_DOWN:{ startX = event.getX(); break ; } case MotionEvent.ACTION_MOVE:{ //向右滑动 break ; } case MotionEvent.ACTION_UP:{ if (event.getX() - startX > 100 ){ flipper.setInAnimation( this ,R.anim.left_in); flipper.setOutAnimation( this , R.anim.left_out); flipper.showPrevious(); //显示前一项 } //向左滑动 if (startX - event.getX() > 100 ){ flipper.setInAnimation( this ,R.anim.right_in); flipper.setOutAnimation( this ,R.anim.right_out); flipper.showNext(); } break ; } } return super .onTouchEvent(event); } |
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