模拟器停止工作
[英]Emulator stopped working
问题描述
I'm very new to the android programming 
我对android编程很陌生
I'm trying to execute the app which I was writing from here , 我正在尝试执行从这里编写的应用程序，
but I can't able to run the app. 但我无法运行该应用。 When I'm trying to run the app, the emulator shows 当我尝试运行应用程序时，模拟器会显示
the Abc(app name) suddenly stopped working
activity_main.xml activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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="horizontal">
<EditText android:id="@+id/edit_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="@string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_send"
android:onClick="sendMessage"
/>
</LinearLayout>
MainActivity.java MainActivity.java
package com.xyz.abc;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
private static final String EXTRA_MESSAGE = "com.xyz.Abc.MESSAGE";
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
// Do something in response to button
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
DisplayMessageActivity.java DisplayMessageActivity.java
package com.xyz.abc;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
public class DisplayMessageActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
@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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() { }
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_display_message,
container, false);
return rootView;
}
}
}
fragment_display_message.xml fragment_display_message.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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.xyz.abc.DisplayMessageActivity$PlaceholderFragment" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/edit_message" />
</LinearLayout>
below is the logcat output for error. 以下是错误的logcat输出。
05-07 06:11:21.004: D/AndroidRuntime(1143): Shutting down VM 05-07 06:11:21.004: W/dalvikvm(1143): threadid=1: thread exiting with uncaught exception (group=0xb2aabba8) 05-07 06:11:21.134: E/AndroidRuntime(1143): FATAL EXCEPTION: main 05-07 06:11:21.134: E/AndroidRuntime(1143): Process: com.xyz.abc, PID: 1143 05-07 06:11:21.134: E/AndroidRuntime(1143): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xyz.abc/com.xyz.abc.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
1 个解决方案
解决方案1
0 2015-12-14 07:04:16
You need to use a Theme.AppCompat theme (or descendant) with this activity.
This is the reason that your app crashes. 这就是您的应用程序崩溃的原因。 Look at your manifest, find the theme of your activity or application and ensure that it extends some AppCompat theme, for ex. 查看清单，找到活动或应用程序的主题，并确保它扩展了某些AppCompat主题，例如。 the auto-generated project in newest Android Studio has it like so: 最新的Android Studio中自动生成的项目如下所示：
AndroidManifest.xml AndroidManifest.xml
<application
...
android:theme="@style/AppTheme">
styles.xml styles.xml
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
...
</style>
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