java – 在AsyncTask中添加视图(文本视图)
发布时间：2020-12-15 05:17:27 所属栏目：Java 来源：网络整理
导读：我使用下面的代码在Async任务中添加文本视图但是： 07-26 11:40:39.302: E/AndroidRuntime(26715): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception07-26 11:40:39.312: E/AndroidRuntime(26715): java.lang.RuntimeException: An
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我使用下面的代码在Async任务中添加文本视图但是：
07-26 11:40:39.302: E/AndroidRuntime(26715): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception 07-26 11:40:39.312: E/AndroidRuntime(26715): java.lang.RuntimeException: An error occured while executing doInBackground() 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.os.AsyncTask$3.done(AsyncTask.java:200) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.lang.Thread.run(Thread.java:1096) 07-26 11:40:39.312: E/AndroidRuntime(26715): Caused by: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.ViewRoot.checkThread(ViewRoot.java:2683) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.ViewRoot.invalidateChild(ViewRoot.java:570) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:596) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.ViewGroup.invalidateChild(ViewGroup.java:2481) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.View.invalidate(View.java:5027) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.ViewGroup.addView(ViewGroup.java:1840) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.view.ViewGroup.addView(ViewGroup.java:1821) 07-26 11:40:39.312: E/AndroidRuntime(26715): at com.learning.chiazi.MainActivity.addTextView(MainActivity.java:180) 07-26 11:40:39.312: E/AndroidRuntime(26715): at com.learning.chiazi.MainActivity$Proccess.doInBackground(MainActivity.java:243) 07-26 11:40:39.312: E/AndroidRuntime(26715): at com.learning.chiazi.MainActivity$Proccess.doInBackground(MainActivity.java:1) 07-26 11:40:39.312: E/AndroidRuntime(26715): at android.os.AsyncTask$2.call(AsyncTask.java:185) 07-26 11:40:39.312: E/AndroidRuntime(26715): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 07-26 11:40:39.312: E/AndroidRuntime(26715): ... 4 more 07-26 11:40:39.342: E/SemcCheckin(26715): Get crash dump level : java.io.FileNotFoundException: /data/semc-checkin/crashdump 我该如何解决这个问题？ 码： public void addTextView(int belowId,int id,String text){
RelativeLayout rSub= (RelativeLayout) findViewById(R.id.rSub);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.BELOW,belowId);
lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
TextView tv = new TextView(this);
tv.setId(id);
tv.setText(text+"n");
rSub.addView(tv,lp);
}
class Proccess extends AsyncTask<Void,Void,Void>{
@Override
protected Void doInBackground(Void... arg0) {
addTextView(R.id.tvResult,1234,"s");
return null;
}
}
解决方法
像这样在后台方法中运行UI线程
@Override
protected Void doInBackground(Void... arg0) {
this.runOnUiThread(new Runnable() {
public void run() {
addTextView(R.id.tvResult,"s");
});
return null;
}
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