[英]Android toolbar title, subtitle and back button not appearing despite setting properties
創建工具欄以替換操作欄后,該工具欄未產生預期的結果。 工具欄本身會根據需要以指定的顏色顯示,但是由於某些原因,標題,字幕和后退按鈕根本不會出現。 該活動的主題甚至設置為Theme.AppCompat.NoActionBar
。
布局/toolbar_turquoise.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/toolbar_turquoise"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/turquoise"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar" />
TurquoiseActivity.java
public class TurquoiseActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar actionBar = getSupportActionBar();
if(actionBar != null) {
Toolbar myToolbar = (Toolbar) findViewById(R.id.toolbar_turquoise);
setSupportActionBar(myToolbar);
myToolbar.setTitle("Hello World");
myToolbar.setTitleTextColor(Color.parseColor("#000099"));
myToolbar.setSubtitle("Lorem ipsum dolor sit amet");
myToolbar.setSubtitleTextColor(Color.parseColor("#000099"));
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
final Drawable upArrow = ContextCompat.getDrawable(this, R.drawable.abc_ic_ab_back_material);
upArrow.setColorFilter(Color.parseColor("#000099"), PorterDuff.Mode.SRC_ATOP);
getSupportActionBar().setHomeAsUpIndicator(upArrow);
}
FragmentTurquoise newFragment = new FragmentTurquoise();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.master_container, newFragment);
transaction.commit();
}
}
嘗試這個,
XML檔案:
<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"
tools:context=".MainActivity">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/turquoise"
android:minHeight="100dp">
</android.support.v7.widget.Toolbar>
</RelativeLayout>
Java類:
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
if(toolbar != null) {
setSupportActionBar(toolbar);
toolbar.setTitle("Hello World");
toolbar.setTitleTextColor(Color.parseColor("#000099"));
toolbar.setSubtitle("Lorem ipsum dolor sit amet");
toolbar.setSubtitleTextColor(Color.parseColor("#000099"));
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
final Drawable upArrow = ContextCompat.getDrawable(this, R.drawable.abc_ic_ab_back_material);
upArrow.setColorFilter(Color.parseColor("#000099"), PorterDuff.Mode.SRC_ATOP);
getSupportActionBar().setHomeAsUpIndicator(upArrow);
}
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