可拖拽的红点，（仿新版QQ，tab下面拖拽标记为已读的效果），拖拽一定的距离可以消失回调。
<com.wangjie.draggableflagview.DraggableFlagView
xmlns:dfv="http://schemas.android.com/apk/res/com.wangjie.draggableflagview"
android:id="@+id/main_dfv"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentBottom="true"
android:layout_margin="15dp"
dfv:color="#FF3B30"
/>
public class MainActivity extends Activity implements DraggableFlagView.OnDraggableFlagViewListener, View.OnClickListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.main_btn).setOnClickListener(this);
DraggableFlagView draggableFlagView = (DraggableFlagView) findViewById(R.id.main_dfv);
draggableFlagView.setOnDraggableFlagViewListener(this);
draggableFlagView.setText("7");
}
@Override
public void onFlagDismiss(DraggableFlagView view) {
Toast.makeText(this, "onFlagDismiss", Toast.LENGTH_SHORT).show();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.main_btn:
Toast.makeText(this, "hello world", Toast.LENGTH_SHORT).show();
break;
}
}
}