Android使用xml文件資源定義菜單實(shí)現(xiàn)方法示例

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:title="@string/app_name"
    android:icon="@drawable/seek02">
    <menu>
      <!--定義一組選項(xiàng)菜單-->
      <group android:checkableBehavior="single">
        <!--定義多個(gè)菜單項(xiàng)-->
        <item
          android:id="@+id/font_10"
          android:title="font_10"/>
        <item
          android:id="@+id/font_12"
          android:title="font_12"/>
        <item
          android:id="@+id/font_14"
          android:title="font_14"/>
        <item
          android:id="@+id/font_16"
          android:title="font_16"/>
        <item
          android:id="@+id/font_18"
          android:title="font_18"/>
      </group>
    </menu>
  </item>
  <!--定義一個(gè)普通菜單項(xiàng)-->
  <item android:id="@+id/plain_item"
    android:title="plain_item"/>
  <item android:title="font_color"
    android:icon="@drawable/seek03">
    <menu>
      <!--定義一個(gè)普通選項(xiàng)菜單-->
      <group>
        <!--定義三個(gè)菜單項(xiàng)-->
        <item
          android:id="@+id/red_font"
          android:title="red_title"/>
        <item
          android:id="@+id/green_font"
          android:title="red_title"/>
        <item
          android:id="@+id/blue_font"
          android:title="red_title"/>
      </group>
    </menu>
  </item>
</menu>

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <!--定義一組單選菜單項(xiàng)-->
  <group android:checkableBehavior="single">
    <!--定義三個(gè)菜單項(xiàng)-->
    <item
      android:id="@+id/red"
      android:title="red_title"
      android:alphabeticShortcut="r"/>
    <item
      android:id="@+id/green"
      android:title="red_title"
      android:alphabeticShortcut="g"/>
    <item
      android:id="@+id/blue"
      android:title="red_title"
      android:alphabeticShortcut="b"/>
  </group>
</menu>

public class MainActivity extends AppCompatActivity {
  private TextView textView;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView = (TextView) findViewById(R.id.txt);
    // 為文本框注冊(cè)上下文菜單
    registerForContextMenu(textView);
  }
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = new MenuInflater(this);
    //裝填R.Menu.my_menu菜單，并添加到menu中
    inflater.inflate(R.menu.menu_main,menu);
    return super.onCreateOptionsMenu(menu);
  }
  //創(chuàng)建上下文菜單時(shí)觸發(fā)該方法
  @Override
  public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    MenuInflater inflater = new MenuInflater(this);
    //裝填R.Menu.menu菜單，并添加到menu中
    inflater.inflate(R.menu.context,menu);
    menu.setHeaderIcon(R.drawable.seek02);
    menu.setHeaderTitle("請(qǐng)選擇背景色");
  }
  //上下文菜單中菜單項(xiàng)被單擊時(shí)，觸發(fā)該方法
  @Override
  public boolean onContextItemSelected(MenuItem item) {
    //勾選菜單項(xiàng)
    item.setChecked(true);
    switch (item.getItemId()){
      case R.id.red:
        item.setChecked(true);
        textView.setBackgroundColor(Color.RED);
        break;
      case R.id.green:
        item.setChecked(true);
        textView.setBackgroundColor(Color.GREEN);
        break;
      case R.id.blue:
        item.setChecked(true);
        textView.setBackgroundColor(Color.BLUE);
        break;
    }
    return true;
  }
  //菜單項(xiàng)被單擊后的回調(diào)方法
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.isCheckable()){
      //勾選菜單項(xiàng)
      item.setCheckable(true);
    }
    //switch 判斷單擊哪個(gè)菜單項(xiàng)，并有針對(duì)性的做出響應(yīng)
    switch (item.getItemId()){
      case R.id.font_10:
        textView.setTextSize(10 * 2);
        break;
      case R.id.font_12:
        textView.setTextSize(12 * 2);
        break;
      case R.id.font_14:
        textView.setTextSize(14 * 2);
        break;
      case R.id.font_16:
        textView.setTextSize(16 * 2);
        break;
      case R.id.font_18:
        textView.setTextSize(18 * 2);
        break;
      case R.id.red_font:
        textView.setTextColor(Color.RED);
        break;
      case R.id.green_font:
        textView.setTextColor(Color.GREEN);
        break;
      case R.id.blue_font:
        textView.setTextColor(Color.BLUE);
        break;
    }
    return true;
  }
}