DraggableFlagView

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。

main.xml

    <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"
                />

MainActivity:

    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;
            }
        }
    }