1、xml文件布局:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- 采用灵活性高的Toolbar替换ActionBar -->
<androidx.appcompat.widget.Toolbar
android:id="@+id/tb_register_back"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
</LinearLayout>
2、Activity中具体的调用代码:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
//初始标题栏
Toolbar toolbar= findViewById(R.id.tb_register_back);
setSupportActionBar(toolbar);
//显示返回按钮
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setHomeButtonEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
/**
* 监听标题栏按钮点击事件.
* @param item 按钮
* @return 结果
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
//返回按钮点击事件
if (item.getItemId() == android.R.id.home) {
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
3、在AndroidManifest.xml中指定anroid:theme=”@style/AppTheme”
4、在res/values/styles.xml中定义AppTheme主题:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>
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