Android之弹出菜单框注冊上下文菜单

【Android之弹出菜单框注冊上下文菜单】古人已用三冬足,年少今开万卷余。这篇文章主要讲述Android之弹出菜单框注冊上下文菜单相关的知识,希望能为你提供帮助。
注冊上下文菜单:(长按弹出一个菜单)


第一种创建方法(与长按事件结合):


public class MainActivity extends Activity {
private TextView username,password;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (TextView) findViewById(R.id.username);
password = (TextView) findViewById(R.id.password);


username.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {


@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
menu.add(" file" );
menu.add(" edit" );
menu.add(" source" );


}
});




}
@Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub
//当菜单上下文元素被选中时运行
Toast.makeText(this, item.getTitle()+ " onContextItemSelected" , 1).show();
return super.onContextItemSelected(item);
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
// TODO Auto-generated method stub
//菜单元素被选中时运行
Toast.makeText(this, item.getTitle()+ " onMenuItemSelected" , 1).show();
return super.onMenuItemSelected(featureId, item);
}
}






另外一种方法:
(注冊上下文菜单)




public class MainActivity extends Activity {
private TextView username,password;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (TextView) findViewById(R.id.username);
password = (TextView) findViewById(R.id.password);


this.registerForContextMenu(username); //注冊菜单
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
menu.add(" file" );
menu.add(" edit" );
super.onCreateContextMenu(menu, v, menuInfo);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub
//当菜单上下文元素被选中时运行
Toast.makeText(this, item.getTitle()+ " onContextItemSelected" , 1).show();
return super.onContextItemSelected(item);
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
// TODO Auto-generated method stub
//菜单元素被选中时运行
Toast.makeText(this, item.getTitle()+ " onMenuItemSelected" , 1).show();
return super.onMenuItemSelected(featureId, item);
}
}


































































































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