我想从数据库动态创建单选按钮，但活动显示错误和崩溃。有致命的异常主要错误，这里是logcat：
09-01 14:37:54.628: I/SurfaceTextureClient(2143): [0x40f0a7d8] frames:54, duration:1.018000, fps:53.007999
09-01 14:37:55.612: D/dalvikvm(2143): threadid=12: exiting
09-01 14:37:55.612: D/dalvikvm(2143): threadid=12: bye!
09-01 14:37:55.615: D/ActivityThread(2143): ACT-AM_ON_PAUSE_CALLED ActivityRecord{418026e8 token=android.os.BinderProxy@41801eb {com.example.ecpvotesystem/com.example.ecpvotesystem.MainActivity}}
09-01 14:37:55.635: D/ActivityThread(2143): ACT-PAUSE_ACTIVITY handled : 1 / android.os.BinderProxy@41801eb8
09-01 14:37:55.693: D/dalvikvm(2143): GC_FOR_ALLOC freed 375K, 4% free 16746K/17271K, paused 18ms, total 23ms
09-01 14:37:55.979: D/AndroidRuntime(2143): Shutting down VM
09-01 14:37:55.979: W/dalvikvm(2143): threadid=1: thread exiting with uncaught exception (group=0x40ff2908)
09-01 14:37:55.999: E/AndroidRuntime(2143): FATAL EXCEPTION: main
09-01 14:37:55.999: E/AndroidRuntime(2143): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ecpvotesystem/com.example.ecpvotesystem.ResultActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2211)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.ActivityThread.access$600(ActivityThread.java:149)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1300)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.os.Handler.dispatchMessage(Handler.java:99)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.os.Looper.loop(Looper.java:153)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.ActivityThread.main(ActivityThread.java:5086)
09-01 14:37:55.999: E/AndroidRuntime(2143): at java.lang.reflect.Method.invokeNative(Native Method)
09-01 14:37:55.999: E/AndroidRuntime(2143): at java.lang.reflect.Method.invoke(Method.java:511)
09-01 14:37:55.999: E/AndroidRuntime(2143): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
09-01 14:37:55.999: E/AndroidRuntime(2143): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
09-01 14:37:55.999: E/AndroidRuntime(2143): at dalvik.system.NativeStart.main(Native Method)
09-01 14:37:55.999: E/AndroidRuntime(2143): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.view.ViewGroup.addViewInner(ViewGroup.java:3459)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.view.ViewGroup.addView(ViewGroup.java:3330)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.view.ViewGroup.addView(ViewGroup.java:3275)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.view.ViewGroup.addView(ViewGroup.java:3251)
09-01 14:37:55.999: E/AndroidRuntime(2143): at com.example.ecpvotesystem.ResultActivity.onCreate(ResultActivity.java:52)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.Activity.performCreate(Activity.java:5020)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
09-01 14:37:55.999: E/AndroidRuntime(2143): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
09-01 14:37:55.999: E/AndroidRuntime(2143): ... 11 more
这是java文件的代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_result);
StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
dbcon=DBConnection.instance(this);
dbcon.connect("ip:1433", "pas", "login", "db");
Context cntxt=getApplicationContext();
try {
Thread.sleep(10);
String city=getIntent().getExtras().getString("city");
String choice=getIntent().getExtras().getString("choice");
LinearLayout ll=new LinearLayout(cntxt);
ll.setOrientation(LinearLayout.VERTICAL);
ImageView iv=new ImageView(cntxt);
RadioGroup.LayoutParams prams=new RadioGroup.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
prams.setMargins(0, 2, 0, 2);
RadioGroup rg=(RadioGroup)findViewById(R.id.RRG);
rg=dbcon.GetResultList(rg,choice,city,iv,cntxt);
ll.addView(rg);
((ViewGroup)findViewById(R.id.RRG)).addView(ll);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
以下是带有参数的GetResultList（）函数：
@SuppressLint("NewApi")
public LinearLayout GetResultList(RadioGroup rg,String choice,String city,ImageView iv,Context context) {
// TODO Auto-generated method stub
if(conn==null){
}
try{
RadioButton rb;
rg.setBackgroundColor(Color.LTGRAY);
Statement st=conn.createStatement();
ResultSet rs=st.executeQuery("select * from AM_NATIONAL where ca_city="+city+ "order by cvg_count");
while (rs.next()){
rb=new RadioButton(context);
rb.setId(rs.getInt(1));
rb.setText(rs.getString(2)+"\n");
rb.setText(rs.getString(3)+"\n");
rb.setText(rs.getInt(8));
byte[] photo=rs.getBytes(4);
Bitmap bitmap;
bitmap=BitmapFactory.decodeByteArray(photo, 0, photo.length);
iv.setImageBitmap(bitmap);
rb.setEnabled(false);
rg.addView(iv);
rg.addView(rb);
}
rs.close();
st.close();
}
catch(SQLException e){
}
return rg;
}
这是xml布局文件：
<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=".ResultActivity" >
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/imageView1"
android:layout_alignParentLeft="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RadioGroup
android:id="@id/RRG"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</RadioGroup>
</LinearLayout>
</ScrollView>
</RelativeLayout>
答案 0 :(得分：1)
您尝试将RadioGroup添加到动态创建的新布局中，然后将其从现有布局中删除...
ll.addView(rg);
上面一行采用RRG RadioGroup并将其添加到动态创建的LinearLayout中，但它已经存在于xml布局中定义的LinearLayout中。
在尝试将其添加到新布局之前，动态创建您的RadioGroup（例如在代码中）或从其父级中删除它试试以下......
((LinearLayout)rg.getParent()).removeView(rg);
ll.addView(rg);
答案 1 :(得分：0)
那里的错误：
ll.addView(rg);
((ViewGroup)findViewById(R.id.RRG)).addView(ll);
您正尝试将rg添加到ll，然后ll添加到rg。你想做什么？