我正准备开发我的第一个应用程序。昨天有一些小小的成功，但是 今天，每当我尝试传递并在新活动中显示意图时，应用程序就会崩溃。 由于我找不到我的错误，我从头开始使用google＆＃34; myFirstApp＆＃34;教程， 尽管如此，我发现自己也有同样的崩溃事件 完全遵循说明。 我没有发现我的错误，所以我礼貌地请你帮我找到错误。
MainActivity：
package com.example.myfirstapp;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Intent;
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.widget.EditText;
import android.os.Build;
public class MainActivity extends ActionBarActivity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
public void sendMessage(View view)
{
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);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
@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;
}
@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_main, container, false);
return rootView;
}
}
}
活动我将意图传递给：
package com.example.myfirstapp;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Intent;
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.widget.TextView;
import android.os.Build;
public class DisplayMessageActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
setContentView(textView);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.display_message, 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();
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;
}
}
}
logcat的：
03-27 19:32:07.786: D/libEGL(3929): loaded /system/lib/egl/libEGL_mali.so
03-27 19:32:07.796: D/libEGL(3929): loaded /system/lib/egl/libGLESv1_CM_mali.so
03-27 19:32:07.796: D/libEGL(3929): loaded /system/lib/egl/libGLESv2_mali.so
03-27 19:32:07.816: D/OpenGLRenderer(3929): Enabling debug mode 0
03-27 19:32:11.470: E/FragmentManager(3929): No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{41c05db0 #0 id=0x7f05003c}
03-27 19:32:11.470: E/FragmentManager(3929): Activity state:
03-27 19:32:11.470: D/FragmentManager(3929): Local FragmentActivity 41bf9838 State:
03-27 19:32:11.470: D/FragmentManager(3929): mCreated=truemResumed=false mStopped=false mReallyStopped=false
03-27 19:32:11.470: D/FragmentManager(3929): mLoadersStarted=false
03-27 19:32:11.470: D/FragmentManager(3929): Active Fragments in 41bf9a70:
03-27 19:32:11.490: D/FragmentManager(3929): #0: PlaceholderFragment{41c05db0 #0 id=0x7f05003c}
03-27 19:32:11.490: D/FragmentManager(3929): mFragmentId=#7f05003c mContainerId=#7f05003c mTag=null
03-27 19:32:11.490: D/FragmentManager(3929): mState=0 mIndex=0 mWho=android:fragment:0 mBackStackNesting=0
03-27 19:32:11.490: D/FragmentManager(3929): mAdded=true mRemoving=false mResumed=false mFromLayout=false mInLayout=false
03-27 19:32:11.490: D/FragmentManager(3929): mHidden=false mDetached=false mMenuVisible=true mHasMenu=false
03-27 19:32:11.490: D/FragmentManager(3929): mRetainInstance=false mRetaining=false mUserVisibleHint=true
03-27 19:32:11.490: D/FragmentManager(3929): mFragmentManager=FragmentManager{41bf9a70 in DisplayMessageActivity{41bf9838}}
03-27 19:32:11.500: D/FragmentManager(3929): mActivity=com.example.myfirstapp.DisplayMessageActivity@41bf9838
03-27 19:32:11.500: D/FragmentManager(3929): Added Fragments:
03-27 19:32:11.500: D/FragmentManager(3929): #0: PlaceholderFragment{41c05db0 #0 id=0x7f05003c}
03-27 19:32:11.500: D/FragmentManager(3929): FragmentManager misc state:
03-27 19:32:11.500: D/FragmentManager(3929): mActivity=com.example.myfirstapp.DisplayMessageActivity@41bf9838
03-27 19:32:11.500: D/FragmentManager(3929): mContainer=android.support.v4.app.FragmentActivity$2@41bf9ae8
03-27 19:32:11.500: D/FragmentManager(3929): mCurState=2 mStateSaved=false mDestroyed=false
03-27 19:32:11.500: D/FragmentManager(3929): View Hierarchy:
03-27 19:32:11.500: D/FragmentManager(3929): com.android.internal.policy.impl.PhoneWindow$DecorView{41bfb3e8 V.E..... ... 0,0-0,0}
03-27 19:32:11.500: D/FragmentManager(3929): android.widget.LinearLayout{41bfba50 V.E..... ... 0,0-0,0}
03-27 19:32:11.500: D/FragmentManager(3929): com.android.internal.widget.ActionBarContainer{41bfc5d8 V.ED.... ... 0,0-0,0 #10203f9 android:id/action_bar_container}
03-27 19:32:11.510: D/FragmentManager(3929): com.android.internal.widget.ActionBarView{41bfcb20 V.E..... ... 0,0-0,0 #10203fa android:id/action_bar}
03-27 19:32:11.510: D/FragmentManager(3929): android.widget.LinearLayout{41c00de0 G....... ... 0,0-0,0}
03-27 19:32:11.510: D/FragmentManager(3929): android.widget.ImageView{41c01a48 G.ED.... ... 0,0-0,0 #1020255 android:id/up}
03-27 19:32:11.510: D/FragmentManager(3929): android.widget.LinearLayout{41c01d48 V.E..... ... 0,0-0,0}
03-27 19:32:11.510: D/FragmentManager(3929): android.widget.TextView{41c020b0 V.ED.... ... 0,0-0,0 #1020268 android:id/action_bar_title}
03-27 19:32:11.510: D/FragmentManager(3929): android.widget.TextView{41c02e20 G.ED.... ... 0,0-0,0 #1020269 android:id/action_bar_subtitle}
03-27 19:32:11.510: D/FragmentManager(3929): com.android.internal.widget.ActionBarView$HomeView{41bfdec8 VFE...C. ... 0,0-0,0}
03-27 19:32:11.520: D/FragmentManager(3929): android.widget.ImageView{41bff3e0 V.ED.... ... 0,0-0,0 #1020255 android:id/up}
03-27 19:32:11.520: D/FragmentManager(3929): android.widget.ImageView{41bff6e0 V.ED.... ... 0,0-0,0 #102002c android:id/home}
03-27 19:32:11.520: D/FragmentManager(3929): com.android.internal.widget.ActionBarContextView{41c03438 G.E..... ... 0,0-0,0 #10203fb android:id/action_context_bar}
03-27 19:32:11.520: D/FragmentManager(3929): android.widget.FrameLayout{41c03950 V.ED.... ... 0,0-0,0 #1020002 android:id/content}
03-27 19:32:11.520: D/FragmentManager(3929): android.widget.TextView{41c05590 V.ED.... ... 0,0-0,0}
03-27 19:32:11.530: D/dalvikvm(3929): GC_CONCURRENT freed 189K, 10% free 9571K/10567K, paused 13ms+3ms, total 52ms
03-27 19:32:11.530: D/FragmentManager(3929): com.android.internal.widget.ActionBarContainer{41c03d40 G.ED.... ... 0,0-0,0 #10203fc android:id/split_action_bar}
03-27 19:32:11.530: D/AndroidRuntime(3929): Shutting down VM
03-27 19:32:11.530: W/dalvikvm(3929): threadid=1: thread exiting with uncaught exception (group=0x411d52a0)
03-27 19:32:11.540: E/AndroidRuntime(3929): FATAL EXCEPTION: main
03-27 19:32:11.540: E/AndroidRuntime(3929): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.DisplayMessageActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{41c05db0 #0 id=0x7f05003c}
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2092)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.ActivityThread.access$700(ActivityThread.java:134)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.os.Handler.dispatchMessage(Handler.java:99)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.os.Looper.loop(Looper.java:137)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.ActivityThread.main(ActivityThread.java:4867)
03-27 19:32:11.540: E/AndroidRuntime(3929): at java.lang.reflect.Method.invokeNative(Native Method)
03-27 19:32:11.540: E/AndroidRuntime(3929): at java.lang.reflect.Method.invoke(Method.java:511)
03-27 19:32:11.540: E/AndroidRuntime(3929): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
03-27 19:32:11.540: E/AndroidRuntime(3929): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
03-27 19:32:11.540: E/AndroidRuntime(3929): at dalvik.system.NativeStart.main(Native Method)
03-27 19:32:11.540: E/AndroidRuntime(3929): Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{41c05db0 #0 id=0x7f05003c}
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:919)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:570)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1178)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.Activity.performStart(Activity.java:5057)
03-27 19:32:11.540: E/AndroidRuntime(3929): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2065)
03-27 19:32:11.540: E/AndroidRuntime(3929): ... 11 more
fragment_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="horizontal" >
<EditText
android:id="@+id/edit_message"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="@string/edit_message"
android:layout_weight="1" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
activity_main.xml中
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.myfirstapp.MainActivity"
tools:ignore="MergeRootFrame" />
fragment_display_message.xml
<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"
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.example.myfirstapp.DisplayMessageActivity$PlaceholderFragment" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
activity_display_message.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.myfirstapp.DisplayMessageActivity"
tools:ignore="MergeRootFrame" />
问候， 约翰
答案 0 :(得分：1)
引起：java.lang.IllegalArgumentException：找不到id的视图 片段的0x7f05003c（com.example.myfirstapp：id / container） PlaceholderFragment {41c05db0＃0 id = 0x7f05003c}
ViewGroup中没有container代码activity_main.xml。
但你有
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment());
在您的xml中有一个ViewGroup，例如FrameLayout，标识为container
编辑：
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
public void sendMessage(View view)
{
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);
}
}
在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="horizontal" >
<EditText
android:id="@+id/edit_message"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="@string/edit_message"
android:layout_weight="1" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
然后
public class DisplayMessageActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
setContentView(textView);
}
}
无需activity_display_message.xml。删除所有不需要的代码
答案 1 :(得分：0)
当您在活动中充气的布局中不存在要添加或替换片段的视图的ID时，抛出此异常。
所以关于你发布的代码，我认为（我必须看到R.layout.activity_display_message xml才能确定）问题是这个布局上不存在container视图，所以在这一行：< / p>
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
DisplayMessageActivity抛出异常。
答案 2 :(得分：0)
我找到了这个帖子，因为我遇到了同样的问题。在尝试了各种建议后，没有成功，我回到教程并仔细阅读说明。这解决了我的问题。虽然我认为在DisplayMessageActivity＃onCreate（）中编辑代码的指令可能更清晰。
我删除了一些生成的代码，最后显示了标题为＆＃34;显示消息＆＃34;
的部分中显示的内容@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the message from the intent
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
}
它有效！