Android自定义APP全局悬浮按钮

 <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />  <uses-permission android:name="android.permission.WRITE_SETTINGS"/>

 private WindowManager.LayoutParams wmParams=new WindowManager.LayoutParams();  public WindowManager.LayoutParams getMywmParams(){    return wmParams;  }

public class CustomeMovebutton extends ImageView {  private final int statusHeight;  int sW;  int sH;  private float mTouchStartX;  private float mTouchStartY;  private float x;  private float y;  private boolean isMove=false;  private Context context;  private WindowManager wm = (WindowManager) getContext().getApplicationContext().getSystemService(Context.WINDOW_SERVICE);  private WindowManager.LayoutParams wmParams = ((MyApplication) getContext().getApplicationContext()).getMywmParams();  private float mLastX;  private float mLastY;  private float mStartX;  private float mStartY;  private long mDownTime;  private long mUpTime;  private OnSpeakListener listener;  public CustomeMovebutton(Context context) {    this(context,null);    this.context = context;  }  public CustomeMovebutton(Context context, AttributeSet attrs) {    this(context, attrs,-1);  }  public CustomeMovebutton(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs,defStyleAttr);    sW = wm.getDefaultDisplay().getWidth();    sH = wm.getDefaultDisplay().getHeight();    statusHeight = getStatusHeight(context);  }  /**   * 状态栏的高度   *   */  public static int getStatusHeight(Context context) {    int statusHeight = -1;    try {      Class clazz = Class.forName("com.android.internal.R$dimen");  //使用反射获取实例      Object object = clazz.newInstance();      int height = Integer.parseInt(clazz.getField("status_bar_height")          .get(object).toString());      statusHeight = context.getResources().getDimensionPixelSize(height);    } catch (Exception e) {      e.printStackTrace();    }    return statusHeight;  }  @Override  public boolean onTouchEvent(MotionEvent event) {    //获取相对屏幕的坐标，即以屏幕左上角为原点    x = event.getRawX();    y = event.getRawY() - statusHeight;  //statusHeight是系统状态栏的高度    switch (event.getAction()) {      case MotionEvent.ACTION_DOWN:  //按下        setImageResource(R.drawable.btn_voice_pressed);        mTouchStartX = event.getX();        mTouchStartY = event.getY();        mStartX = event.getRawX();        mStartY = event.getRawY();        mDownTime = System.currentTimeMillis();        isMove = false;        break;      case MotionEvent.ACTION_MOVE:  //手指移动        updateViewPosition();        isMove = true;        break;      case MotionEvent.ACTION_UP:  //手抬起        setImageResource(R.drawable.btn_voice_rest);        mLastX = event.getRawX();        mLastY = event.getRawY();        mUpTime = System.currentTimeMillis();        //按下到抬起的时间大于500毫秒,并且抬手到抬手绝对值大于20像素处理点击事件        if(mUpTime - mDownTime < 500){          if(Math.abs(mStartX- mLastX )< 20.0 && Math.abs(mStartY - mLastY) < 20.0){              if (listener!=null){                listener.onSpeakListener();              }          }        }        break;    }    return true;  }  private void updateViewPosition() {    wmParams.x = (int) (x - mTouchStartX);    wmParams.y = (int) (y- mTouchStartY);    wm.updateViewLayout(this, wmParams); //刷新显示  }  /**   * 设置点击回调接口   */  public interface OnSpeakListener{    void onSpeakListener();  }  public void setOnSpeakListener(OnSpeakListener listener){    this.listener=listener;  }}

public class MainActivity extends AppCompatActivity{  private WindowManager wm;  private WindowManager.LayoutParams wmParams;  private CustomeMovebutton CustomeMovebutton;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    wm = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);    DisplayMetrics dm = getResources().getDisplayMetrics();    int widthPixels = dm.widthPixels;    int heightPixels = dm.heightPixels;    wmParams = ((MyApplication) getApplication()).getMywmParams();    wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;    wmParams.format= PixelFormat.RGBA_8888;//设置背景图片    wmParams.flags= WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE ;//    wmParams.gravity = Gravity.LEFT|Gravity.TOP;//    wmParams.x = widthPixels-150;  //设置位置像素    wmParams.y = heightPixels-110;    wmParams.width=200; //设置图片大小    wmParams.height=200;    CustomeMovebutton = new CustomeMovebutton(getApplicationContext());    CustomeMovebutton.setImageResource(R.drawable.btn_voice_rest);    wm.addView(CustomeMovebutton, wmParams);    CustomeMovebutton.setOnSpeakListener(new CustomeMovebutton.OnSpeakListener() {      @Override      public void onSpeakListener() {        Toast.makeText(MainActivity.this, "点击事件", Toast.LENGTH_SHORT).show();      }    });  }  @Override  protected void onDestroy() {    super.onDestroy();    if(CustomeMovebutton != null){      wm.removeView(CustomeMovebutton);    }  }}