安卓开发中的手势操作监听1双击2.滑动关闭Activity 3.放大缩小图片等手势操作,

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安卓开发中加入一些手势操作会给用户使用可以带来更多方便,

所以有的界面加入手势操作,会是很不错的做法哦

我就提供以下我自己做的手势监听,都是在官方的API基础上加以处理

有双击手势,右滑关闭Activity,放大缩小图片,等主要操作

直接提供以下代码吧大家参考一下吧

/** * hbm * 提供以下的手势监听,当然其他方法也可以实现 * 手势监听特色包括1.双击 2.手势滑动(启动距离->到结束距离) 3.放大缩小 */public class MainActivity extends AppCompatActivity {    //提示    private TextView mTvHint;    //双击显示图片    private ImageView mIvGood, mIvLama;    //双击, 滑动关闭 手势监听    private GestureDetector mDetector;    //缩放因数    private float mFactor;    //放大图片手势    private ScaleGestureDetector mScale;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        setListener();    }    private void setListener() {        //手势监听        mDetector = new GestureDetector(this, new GestureListener(mTvHint, mIvGood, this));        //放大图片手势        mScale = new ScaleGestureDetector(this, new ScaleListener());    }    @Override    public boolean onTouchEvent(MotionEvent event) {        return mDetector.onTouchEvent(event) || mScale.onTouchEvent(event);    }    private void initView() {        mTvHint = (TextView) findViewById(R.id.tvHint);        mIvGood = (ImageView) findViewById(R.id.ivGood);        mIvLama = (ImageView) findViewById(R.id.ivLama);    }    //手势监听    class GestureListener extends GestureDetector.SimpleOnGestureListener {        //提示        private TextView mTvHint;        //双击显示图片        private ImageView mIvGood;        private Context mContext;        public GestureListener(TextView tvHint, ImageView ivGood, Context context) {            this.mTvHint = tvHint;            this.mIvGood = ivGood;            this.mContext = context;        }        @Override        public boolean onDoubleTap(MotionEvent e) {            Log.i("main", "手势的双击事件");            mIvGood.setVisibility(View.VISIBLE);            mIvGood.setImageResource(R.drawable.apk3);            mTvHint.setText("双击监听");            new Handler().postDelayed(new Runnable() {                @Override                public void run() {                    mIvGood.setVisibility(View.GONE);                }            }, 500);            return super.onDoubleTap(e);        }        @Override        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {            Log.i("main", "e1=" + e1.getX() + "e2=" + e2.getY() + "velocityX速度=" + velocityX + "velocityY=" + velocityY);            //触摸起点坐标 结束坐标            if (e1.getX() < (e2.getX() - 200) || velocityX > 1000) {                Toast.makeText(mContext, "这个滑动事件是关闭页面手势", Toast.LENGTH_LONG).show();                ((MainActivity) mContext).finish();            }            return false;        }        @Override        public void onLongPress(MotionEvent e) {            Log.i("main", "手势的按下未松开、未移动的事件");            mTvHint.setText("手势的按下未松开、未移动的事件");            super.onLongPress(e);        }        @Override        public boolean onDown(MotionEvent e) {            Log.i("main", "手势的按下事件");            return super.onDown(e);        }        @Override        public boolean onSingleTapUp(MotionEvent e) {            Log.i("main", "手势的单击事件");            return super.onSingleTapUp(e);        }        @Override        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {            Log.i("main", "手势的滚动事件");            return super.onScroll(e1, e2, distanceX, distanceY);        }    }    //图片放大手势监听    class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {        @Override        public boolean onScale(ScaleGestureDetector detector) {            mFactor *= detector.getScaleFactor();            //0.2-4            mFactor = Math.min(4, Math.max(mFactor, 0.3f));            ViewPropertyAnimator animate = mIvLama.animate();            animate.scaleX(mFactor)                    .scaleY(mFactor)                    .setDuration(300)                    .start();            return super.onScale(detector);        }    }}

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