activity 中创建view 随手拖动

实现一 往根布局里加,比较麻烦,好像还要考虑外层布局

public class MainActivityC extends AppCompatActivity {

String TAG="-------------------";

RelativeLayout inflate;

RelativeLayout ll;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ll = (RelativeLayout)findViewById(R.id.ro);

inflate = (RelativeLayout)LayoutInflater.from(this).inflate(R.layout.a1, null);

}

@Override

public boolean onTouchEvent(MotionEvent event) {

Log.e("-------"," "+event.getAction()+" x "+event.getX()+" y "+event.getY());

switch (event.getAction()){

case MotionEvent.ACTION_DOWN:

ll.removeView(inflate);

inflate.setX(event.getX());

inflate.setY(event.getY());

inflate.setZ(100);

ll.addView(inflate);

break;

case MotionEvent.ACTION_MOVE:

inflate.setX(event.getX());

inflate.setY(event.getY());

break;

case MotionEvent.ACTION_UP:

ll.removeView(inflate);

break;

}

return super.onTouchEvent(event);

}

}

实现二 比较简单，往Window上加一层位置也比较正确，其他情况待验

public class MainActivityC extends AppCompatActivity {

RelativeLayout inflate;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Window window = getWindow();

inflate = (RelativeLayout)LayoutInflater.from(this).inflate(R.layout.a1, null);

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);

inflate.setLayoutParams(layoutParams);

window.addContentView(inflate,inflate.getLayoutParams());

}

@Override

public boolean onTouchEvent(MotionEvent event) {

Log.e("-------"," "+event.getAction()+" x "+event.getX()+" y "+event.getY());

switch (event.getAction()){

case MotionEvent.ACTION_DOWN:

inflate.setX(event.getX());

inflate.setY(event.getY());

inflate.setZ(100);

inflate.setVisibility(View.VISIBLE);

break;

case MotionEvent.ACTION_MOVE:

inflate.setX(event.getX());

inflate.setY(event.getY());

break;

case MotionEvent.ACTION_UP:

inflate.setVisibility(View.GONE);

break;

}

return super.onTouchEvent(event);

}

}