這是主要活動,因爲 您可以清楚地看到import android.support.v7.widget.Toolbar;
已經存在。setSupportActionBar(工具欄)運行時錯誤即使導入android.support.v7.widget.Toolbar
package app.com.example.anandujjwal.zoom;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportActionBar().hide();
Toolbar toolbar=(Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
主要活動xml文件如下。 有一個在符合setSupportActionBar(toolbar)
<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"
tools:context=".MainActivity">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:background="?attr/colorPrimary"
android:minHeight="?android:attr/actionBarSize"
/>
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
styles.xml是運行時錯誤低於
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light">
<!-- Customize your theme here. -->
<item name="colorPrimary">#006400</item>
<item name="android:windowActionBar">false</item>
<item name="android:textColorPrimary">#FFFFFF</item>
<item name="android:textColorSecondary">#FFFFFF</item>
</style>
</resources>
如果你打算使用工具欄作爲ActionBar,你的主題應該擴展'Theme.AppCompat.Light.NoActionBar'。然後擺脫'getSupportActionBar()。hide()'。 –
remove'getSupportActionBar()。hide();' –