下上文菜单(Context Menu)(长按TextView弹出)
上下文菜单(Context Menu)(长按TextView弹出)
public class MainActivity extends Activity { private static final int ITME1 = Menu.FIRST; private static final int ITME2 = Menu.FIRST+1; private static final int ITME3 = Menu.FIRST+2; private TextView myTV; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myTV = (TextView)findViewById(R.id.TextView01); registerForContextMenu(myTV);//注册上下文菜单 } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { menu.add(0, ITME1, 0, "红色背景"); menu.add(0, ITME2, 0, "绿色背景"); menu.add(0, ITME3, 0, "白色背景"); } @Override public boolean onContextItemSelected(MenuItem item) { switch (item.getItemId()) { case ITME1: myTV.setBackgroundColor(Color.RED); break; case ITME2: myTV.setBackgroundColor(Color.GREEN); break; case ITME3: myTV.setBackgroundColor(Color.WHITE); break; } return true; } }
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/TextView01" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="测试上下文菜单(改变文字背景色)"></TextView> </LinearLayout>