android ContextMenu上下文菜单

本例子对textview添加了一个上下文菜单，长按textview会显示菜单

public class MainActivity extends Activity {

private TextView edit;

final int MENU1 = 0x111;

final int MENU2 = 0x112;

final int MENU3 = 0x113;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

edit = (TextView) findViewById(R.id.textView1);

registerForContextMenu(edit);

}

@Override

public boolean onContextItemSelected(MenuItem item) {

switch (item.getItemId()) {

case MENU1:

item.setCheckable(true);

edit.setBackgroundColor(Color.RED);

break;

case MENU2:

item.setCheckable(true);

edit.setBackgroundColor(Color.GREEN);

break;

case MENU3:

item.setCheckable(true);

edit.setBackgroundColor(Color.BLUE);

break;

}

return true;

}

@Override

public void onCreateContextMenu(ContextMenu menu, View v,

ContextMenuInfo menuInfo) {

menu.add(0, MENU1, 0, "红色");

menu.add(0, MENU2, 0, "绿色");

menu.add(0, MENU3, 0, "蓝色");

menu.setGroupCheckable(0, true, true);

menu.setHeaderIcon(R.drawable.ic_launcher);

menu.setHeaderTitle("选择背景颜色");

}

}