OnProgressUpdate 无法在 TextView 中设置文本

Question

protected Long doInBackground(String... address) {
            while(true){
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                setProgress(100);
                onProgressUpdate(getping(address[0]));
            }
        }    

protected void onProgressUpdate(Long... values){
                result.setText(String.valueOf(values[0]));
                builder.setContentText(String.valueOf(values[0]));
                notificationManager.notify(1,builder.build());
            }

此块在 Android Oreo 及更高版本上运行良好，但无法在以下任何版本上设置文本

日志猫：-

11-05 16:18:26.041 4720-4752/com.pcartistofficial.pingtesterforgames E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1 Process: com.pcartistofficial.pingtesterforgames, PID: 4720 java.lang.RuntimeException: An error occured while executing doInBackground() at android.os.AsyncTask.done(AsyncTask.java:304) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) at java.util.concurrent.FutureTask.setException(FutureTask.java:222) at java.util.concurrent.FutureTask.run(FutureTask.java:242) at android.os.AsyncTask$SerialExecutor.run(AsyncTask.java:231) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:818) Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:6357) at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:909) at android.view.ViewGroup.invalidateChild(ViewGroup.java:4690) at android.view.View.invalidateInternal(View.java:11801) at android.view.View.invalidate(View.java:11765) at android.view.View.invalidate(View.java:11749) at android.widget.TextView.checkForRelayout(TextView.java:6858) at android.widget.TextView.setText(TextView.java:4057) at android.widget.TextView.setText(TextView.java:3915) at android.widget.TextView.setText(TextView.java:3890) at com.pcartistofficial.pingtesterforgames.MainActivity$BackgroundTasker.onProgressUpdate(MainActivity.java:96) at com.pcartistofficial.pingtesterforgames.MainActivity$BackgroundTasker.doInBackground(MainActivity.java:90) at com.pcartistofficial.pingtesterforgames.MainActivity$BackgroundTasker.doInBackground(MainActivity.java:67) at android.os.AsyncTask.call(AsyncTask.java:292) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor.run(AsyncTask.java:231) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:818)

Answer 1

我假设你在 doInBackground 方法中直接调用这个方法导致了这个异常。相反，尝试在调用 onProgressUpdate 方法

的 doInBackground 方法中调用 publishProgress({your values})

Reference to AsyncTask API documentation

OnProgressUpdate 无法在 TextView 中设置文本

OnProgressUpdate cant SetText in TextView

android

android-asynctask