ContextMenu

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src 中的 MainActivity：

public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);registerForContextMenu(findViewById(R.id.imageView1));registerForContextMenu(findViewById(R.id.textView1));}private static final int MENU_SHARE_ID = 100;private static final int MENU_SAVE_ID = 200;private static final int MENU_OPEN_ID = 300;private static final int MENU_FIND_ID = 400;@Overridepublic void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {switch(v.getId()){case R.id.imageView1:menu.add(Menu.NONE,MENU_SHARE_ID,1,"保存");menu.add(Menu.NONE,MENU_SAVE_ID,2,"共享");break;case R.id.textView1:menu.add(Menu.NONE,MENU_OPEN_ID,1,"打开");menu.add(Menu.NONE,MENU_FIND_ID,2,"查看");break;}super.onCreateContextMenu(menu, v, menuInfo);}@Overridepublic boolean onContextItemSelected(MenuItem item) {switch(item.getItemId()){case MENU_SAVE_ID:Toast.makeText(this, "保存图片", Toast.LENGTH_SHORT).show();break;case MENU_SHARE_ID:Toast.makeText(this, "共享图片", Toast.LENGTH_SHORT).show();break;case MENU_OPEN_ID:Toast.makeText(this, "打开文字", Toast.LENGTH_SHORT).show();break;case MENU_FIND_ID:Toast.makeText(this, "查看文字", Toast.LENGTH_SHORT).show();break;}return super.onContextItemSelected(item);}}

layout 中的 activity_main.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <TextView        android:id="@+id/textView1"        android:layout_below="@+id/imageView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="32sp"        android:layout_centerHorizontal="true"        android:text="ContextMenu" />    <ImageView        android:id="@+id/imageView1"        android:layout_width="150dp"        android:layout_height="150dp"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:src="@drawable/ic_launcher" /></RelativeLayout>

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