onCreate 中添加

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

        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
	}
		
		

Activity 中添加

		
 	@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                return true;
            default:
                break;
        }
        return super.onOptionsItemSelected(item);
    }

		
		

在AndroidManifest.xml中标明Activity的主题

		
<activity
            android:name=".ui.ShareActivity"
            android:exported="false"
            android:theme="@style/AppTheme"/>		
		
		

values/styles.xml 文件中增加

		
 	<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorThemeBackGround</item>
        <item name="colorPrimaryDark">@color/colorThemeBackGround</item>
        <item name="colorAccent">@color/colorThemeBackGround</item>
    </style>