Android Menu菜单小例子

[dinchen]

先贴上xml代码

<LinearLayout
    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:orientation="vertical"
    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="davidwill.crazyandroid.MenuActivity">


    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edittexttxt"
        android:text="@string/testContent"
        android:editable="false"/>

</LinearLayout>

然后是Activity代码

public class MenuActivity extends AppCompatActivity
{
    final int FONT_10 = 0x111;
    final int FONT_12 = 0x112;
    final int FONT_14 = 0x113;
    final int FONT_16 = 0x114;
    final int FONT_18 = 0x115;
    // 定义普通菜单项的标识
    final int PLAIN_ITEM = 0x11b;
    // 定义字体颜色菜单项的标识
    final int FONT_RED = 0x116;
    final int FONT_BLUE = 0x117;
    final int FONT_GREEN = 0x118;

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        SubMenu fontMenu = menu.addSubMenu(R.string.fontSize);
        fontMenu.setIcon(R.drawable.b);
        fontMenu.setHeaderIcon(R.drawable.b);
        fontMenu.setHeaderTitle(R.string.selectFontSize);
        fontMenu.add(0, FONT_10, 0, "10号字体");
        fontMenu.add(0, FONT_12, 0, "12号字体");
        fontMenu.add(0, FONT_14, 0, "14号字体");
        fontMenu.add(0, FONT_16, 0, "16号字体");
        fontMenu.add(0, FONT_18, 0, "18号字体");
        menu.add(0, PLAIN_ITEM, 0, "普通菜单项");
        SubMenu colorMenu = menu.addSubMenu("字体颜色");
        colorMenu.setIcon(R.drawable.b);
        colorMenu.setHeaderIcon(R.drawable.b);
        colorMenu.add(0, FONT_RED, 0, "红色");
        colorMenu.add(0, FONT_GREEN, 0, "绿色");
        colorMenu.add(0, FONT_BLUE, 0, "蓝色");
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);

        edittextTxt = (EditText) findViewById(R.id.edittexttxt);

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        switch(item.getItemId())
        {
            case FONT_10:
                edittextTxt.setTextSize(10 * 2);
                break;
            case FONT_12:
                edittextTxt.setTextSize(12 * 2);
                break;
            case FONT_14:
                edittextTxt.setTextSize(14 * 2);
                break;
            case FONT_16:
                edittextTxt.setTextSize(16 * 2);
                break;
            case FONT_18:
                edittextTxt.setTextSize(18 * 2);
                break;
            case FONT_RED:
                edittextTxt.setTextColor(Color.RED);
                break;
            case FONT_GREEN:
                edittextTxt.setTextColor(Color.GREEN);
                break;
            case FONT_BLUE:
                edittextTxt.setTextColor(Color.BLUE);
                break;
            case PLAIN_ITEM:
                Toast t = Toast.makeText(this, "你单击了普通菜单项", Toast.LENGTH_SHORT);
                t.show();
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    private EditText edittextTxt;
}

看到效果了吗？