您好我正在编写一个程序来添加动态testview.i想要在单击按钮时添加textview。但是当我添加textview时我收到错误
这是我的日志文件
02-25 22:13:08.835: W/dalvikvm(3609): threadid=1: thread exiting with uncaught exception (group=0x40f102a0)
02-25 22:13:08.843: E/AndroidRuntime(3609): FATAL EXCEPTION: main
02-25 22:13:08.843: E/AndroidRuntime(3609): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.view.ViewGroup.addViewInner(ViewGroup.java:3387)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.view.ViewGroup.addView(ViewGroup.java:3258)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.view.ViewGroup.addView(ViewGroup.java:3234)
02-25 22:13:08.843: E/AndroidRuntime(3609): at com.example.test.MainActivity$1.onClick(MainActivity.java:37)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.view.View.performClick(View.java:4222)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.view.View$PerformClick.run(View.java:17273)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.os.Handler.handleCallback(Handler.java:615)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.os.Handler.dispatchMessage(Handler.java:92)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.os.Looper.loop(Looper.java:137)
02-25 22:13:08.843: E/AndroidRuntime(3609): at android.app.ActivityThread.main(ActivityThread.java:4895)
02-25 22:13:08.843: E/AndroidRuntime(3609): at java.lang.reflect.Method.invokeNative(Native Method)
02-25 22:13:08.843: E/AndroidRuntime(3609): at java.lang.reflect.Method.invoke(Method.java:511)
02-25 22:13:08.843: E/AndroidRuntime(3609): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
02-25 22:13:08.843: E/AndroidRuntime(3609): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
02-25 22:13:08.843: E/AndroidRuntime(3609): at dalvik.system.NativeStart.main(Native Method)
我的活动课
import android.os.Bundle;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class MainActivity extends Activity {
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=(Button)findViewById(R.id.button);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
LinearLayout layout=(LinearLayout)findViewById(R.id.rlayout);
LayoutInflater mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
View vs= (View) mInflater.inflate(R.layout.test, null);
TextView textView = (TextView) vs.findViewById(R.id.tview);
textView.setText("your text");
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
layout.addView(textView,p);
}
});
}
@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;
}
}
actvity_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"
tools:context=".MainActivity"
android:id="@+id/rlayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
的test.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"
android:id="@+id/test" >
<TextView
android:id="@+id/tview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
请帮忙.. 提前致谢
答案 0 :(得分：0)
您正在向已有父级的LinearLayout添加TextView。您的错误消息非常清楚。
您需要先从其父级布局中删除TextView，然后才能将其添加到其他布局。
这样做：
TextView textView = (TextView) vs.findViewById(R.id.tview);
vs.removeView(textView); // assuming "vs" is the parent layout of your TextView
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
LinearLayout layout = (LinearLayout)findViewById(R.id.rlayout);
layout.addView(textView,p);
请注意，我只是假设“vs”是TextView的父布局。只需查看布局文件，即可获得TextView的父布局。然后致电：
parent.removeView(textView);
答案 1 :(得分：0)
您尝试添加的文本视图（tview）已经存在于您已膨胀的布局中（activity_main）。它不能再次添加，因为它已经有父布局
而不是这样你应该做一个
TextView textView = new TextView（v.getContext（））;
动态创建文本视图，然后将其添加到布局
答案 2 :(得分：0)
您的TextView“textView”已经存在并附加到View“vs”。
您无需为这样简单的操作充气xml。你可以这样做：
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
LinearLayout layout=(LinearLayout)findViewById(R.id.rlayout);
TextView textView = new TextView(MainActivity.this);
textView.setText("your text");
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
layout.addView(textView,p);
}
答案 3 :(得分：0)
IllegalStateException正在发生，因为您尝试在TextView中添加的layout textView是vs的孩子。您应该将vs视图添加到layout。下面我已更新代码...请查看。
将以下侦听器代码段替换为您的。
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
LinearLayout layout=(LinearLayout)findViewById(R.id.rlayout);
LayoutInflater mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
View vs= (View) mInflater.inflate(R.layout.test, null);
TextView textView = (TextView) vs.findViewById(R.id.tview);
textView.setText("your text");
layout.addView(vs);
}
});