指定的孩子已经有一个父母。 您必须首先调用子对象的父对象的removeView（）
我创build这个post，因为我是新手，我需要一点帮助。 我正在做一个关于你的名字的应用程序，它会返回“你好（你放的名字）”。 但是，我按下button后，我得到的错误“指定的孩子已经有一个父母，你必须首先调用孩子的父母removeView（）
MainActivity.java
package com.example.holaamigos; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.*; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class MainActivity extends Activity { public final static String EXTRA_SALUDO = "com.example.holaamigos.SALUDO"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final EditText txtNombre = (EditText)findViewById(R.id.TxtNombre); final Button btnHola = (Button)findViewById(R.id.BtnHola); btnHola.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this, ActivitySaludo.class); String saludo = txtNombre.getText().toString(); intent.putExtra(EXTRA_SALUDO, saludo); startActivity(intent); } }); } @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; } } ActivitySaludo.java
package com.example.holaamigos; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.widget.TextView; public class ActivitySaludo extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_saludo); Intent intent = getIntent(); String saludo = intent.getStringExtra(MainActivity.EXTRA_SALUDO); //TextView txt = new TextView(this); //txt.setText(20); //txt.setText(saludo); TextView txtCambiado = (TextView) findViewById(R.id.TxtSaludo); txtCambiado.setText(saludo); setContentView(txtCambiado); } }
activity_saludo.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/TxtSaludo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" /> </LinearLayout>
activity_main.xml中
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/LinearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/LblNombre" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/nombre" /> <EditText android:id="@+id/TxtNombre" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="text" /> <Button android:id="@+id/BtnHola" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hola_apy" android:onClick="enviarSaludo"/> </LinearLayout>
logcat的
10-10 16:12:18.470: D/AndroidRuntime(810): Shutting down VM 10-10 16:12:18.470: W/dalvikvm(810): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 10-10 16:12:18.586: E/AndroidRuntime(810): FATAL EXCEPTION: main 10-10 16:12:18.586: E/AndroidRuntime(810): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.holaamigos/com.example.holaamigos.ActivitySaludo}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.ActivityThread.access$600(ActivityThread.java:141) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.os.Handler.dispatchMessage(Handler.java:99) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.os.Looper.loop(Looper.java:137) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.ActivityThread.main(ActivityThread.java:5041) 10-10 16:12:18.586: E/AndroidRuntime(810): at java.lang.reflect.Method.invokeNative(Native Method) 10-10 16:12:18.586: E/AndroidRuntime(810): at java.lang.reflect.Method.invoke(Method.java:511) 10-10 16:12:18.586: E/AndroidRuntime(810): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 10-10 16:12:18.586: E/AndroidRuntime(810): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 10-10 16:12:18.586: E/AndroidRuntime(810): at dalvik.system.NativeStart.main(Native Method) 10-10 16:12:18.586: E/AndroidRuntime(810): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 10-10 16:12:18.586: E/AndroidRuntime(810): at android.view.ViewGroup.addViewInner(ViewGroup.java:3339) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.view.ViewGroup.addView(ViewGroup.java:3210) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.view.ViewGroup.addView(ViewGroup.java:3186) 10-10 16:12:18.586: E/AndroidRuntime(810): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:289) 10-10 16:12:18.586: E/AndroidRuntime(810): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:279) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.Activity.setContentView(Activity.java:1901) 10-10 16:12:18.586: E/AndroidRuntime(810): at com.example.holaamigos.ActivitySaludo.onCreate(ActivitySaludo.java:25) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.Activity.performCreate(Activity.java:5104) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 10-10 16:12:18.586: E/AndroidRuntime(810): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 10-10 16:12:18.586: E/AndroidRuntime(810): ... 11 more 10-10 16:12:18.856: D/dalvikvm(810): GC_CONCURRENT freed 134K, 10% free 2630K/2908K, paused 73ms+83ms, total 237ms
我遇到这个错误，每当我省略一个参数，而在onCreateView()方法中的一个片段膨胀的视图像这样：
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view=inflater.inflate(R.layout.fragment_reject, container); return view; }
解决办法是将视图膨胀线更改为：
View view=inflater.inflate(R.layout.fragment_reject, container,false);
解释可以在Android的碎片指南中find
从引导引用，视图初始化语句中的最后一个参数是false，因为：
“系统已经将膨胀的布局插入到容器中，传递true将在最终布局中创build冗余视图组”
在onCreate与活动或onCreateView与片段
if (view != null) { ViewGroup parent = (ViewGroup) view.getParent(); if (parent != null) { parent.removeView(view); } } try { view = inflater.inflate(R.layout.fragment_main, container, false); } catch (InflateException e) { }
在ActivitySaludo ，这一行，
setContentView(txtCambiado);
您只能为该活动设置一次内容视图。
你不需要这行： setContentView(txtCambiado);
试试这样，希望这会帮助你解决你的问题。
TextView textView = new TextView(this); textView.setText("CustomTextView"); addContentView(textView,new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
在我的情况下，我不小心从Layout.onCreateView()返回一个子视图，如下所示：
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_reject, container, false); Button button = view.findViewById(R.id.some_button); return button; // <-- Problem is this }
解决scheme是返回父视图而不是子视图。
你只需要在onCreate（）方法中初始化你的视图，然后在setView（）之前再次在onCreateDialog（）中，它应该是工作！
如果您在for循环中重复添加相同的视图。如果是这种情况，请尝试在for循环内创build布局的View对象。 并在for循环中添加视图
为了避免这样的问题
