本文介绍了在 setSupportActionBar 上的 Android 应用程序崩溃的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试按照以下教程创建选项卡视图布局:http://www.android4devs.com/2015/01/how-to-make-material-design-sliding-tabs.html
I'm trying to follow the following tutorial to create a tab view layout: http://www.android4devs.com/2015/01/how-to-make-material-design-sliding-tabs.html
不幸的是，应用程序在出现任何问题之前一直崩溃.在我的代码中插入调试日志后，我发现问题出在 MainActivity 中的 setSupportActionBar(toolbar) 行.我不知道为什么会这样.我在下面粘贴了我的整个 MainActivity 文件.
Unfortunately, the app kept crashing before anything came up. After inserting debug logs into my code, I found that the problem resided in the line setSupportActionBar(toolbar) in MainActivity. I have no idea why this is happening. I have pasted my entire MainActivity file below.
package com.example.rkhaj.tabstest;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
// Declaring Your View and Variables
Toolbar toolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Home","Events"};
int Numboftabs =2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d("icecream", "position 1");
// Creating The Toolbar and setting it as the Toolbar for the activity
toolbar = (Toolbar) findViewById(R.id.tool_bar);
Log.d("icecream", "position 1.5");
setSupportActionBar(toolbar);
Log.d("icecream", "position 2");
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
Log.d("icecream", "position 3");
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
Log.d("icecream", "position 4");
// Assinging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
Log.d("icecream", "position 5");
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
@Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
Log.d("icecream", "position 6");
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
Log.d("icecream", "position 7");
}
@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);
}
}
这是activity_main.xml:
This is activity_main.xml:
<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">
<include
android:id="@+id/tool_bar"
layout="@layout/tool_bar"
android:layout_height="wrap_content"
android:layout_width="match_parent"
/>
<com.example.rkhaj.tabstest.SlidingTabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="2dp"
android:background="@color/ColorPrimary"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="1"
>
</android.support.v4.view.ViewPager>
</LinearLayout>
这是日志猫:
09-07 16:46:27.772 22833-22833/com.example.rkhaj.tabstest I/art﹕ Late-enabling -Xcheck:jni
09-07 16:46:27.772 22833-22833/com.example.rkhaj.tabstest I/art﹕ VMHOOK: rlim_cur : 0 pid:22833
09-07 16:46:27.812 22833-22833/com.example.rkhaj.tabstest E/Typeface﹕ SANS_LOC file not found.
09-07 16:46:27.882 22833-22833/com.example.rkhaj.tabstest D/icecream﹕ position 1
09-07 16:46:27.882 22833-22833/com.example.rkhaj.tabstest D/icecream﹕ position 1.5
09-07 16:46:27.882 22833-22833/com.example.rkhaj.tabstest E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.rkhaj.tabstest, PID: 22833
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.rkhaj.tabstest/com.example.rkhaj.tabstest.MainActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2411)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2474)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1359)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5696)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.support.v7.app.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDelegateImplV7.java:197)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:99)
at com.example.rkhaj.tabstest.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:5958)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2474)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1359)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5696)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)
09-07 16:46:39.442 22833-22833/com.example.rkhaj.tabstest D/Process﹕ killProcess, pid=22833
09-07 16:46:39.442 22833-22833/com.example.rkhaj.tabstest D/Process﹕ com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException:138 java.lang.ThreadGroup.uncaughtException:693 java.lang.ThreadGroup.uncaughtException:690
推荐答案
由于您在布局中使用了 Toolbar，您应该使用 Theme.AppCompat.NoActionBar 作为你的父主题.
Since you are using a Toolbar in your layout, you should use Theme.AppCompat.NoActionBar as your parent theme.
否则你可以使用类似的东西:
Otherwise you can use somenthing like:
<style name="MyTheme" parent="Theme.AppCompat">
...
</style>
<style name="MyTheme.NoActionBar">
<!-- Both of these are needed -->
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
这篇关于在 setSupportActionBar 上的 Android 应用程序崩溃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！