java - 无限循环卡在 run() - 方法(Android 模拟器)

Question

我们正在尝试构建一个应用程序，每隔几秒左右记录一次分贝级别。问题是我们需要在轮询分贝级别的 run() 方法中有一个无限循环，但是当我们添加无限循环时，它会挂起。谁能指出我们正确的方向？谢谢。

代码如下:

package tpsip.tpsip;

import android.app.Activity;
import android.graphics.Color;
import android.media.AudioManager;
import android.media.ToneGenerator;
import android.os.Bundle;
import android.os.Handler;
import android.widget.Button;
import android.widget.TextView;


public class tpsip extends Activity implements Runnable{

private TextView decibelMeter;
private TextView timeRemaining;
private Button button;
private int safetyTime;


ExposureCalculator calculator = new ExposureCalculator();
Handler handler = new Handler();
Thread thread = new Thread();
LogicLayer logicLayer = new LogicLayer();


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {

    this.safetyTime = 28800; //8 hours of safe time when the decibel level is between 90-92, levels below this are not considered dangerous to hearing

    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    this.decibelMeter = (TextView)findViewById(R.id.textView2);
    this.decibelMeter.setText("0 dB");

    this.timeRemaining = (TextView)findViewById(R.id.textView3);
    this.timeRemaining.setText("Safety time remaining " + safetyTime + " seconds");

    this.button = (Button) findViewById(R.id.button1);
    button.setBackgroundColor(Color.GREEN);
    button.setText("Ear protection not needed");

    handler.post(thread);

    this.run();

}

@Override
public void run() {
        int a = 10;
    while(true) {
        this.decibelMeter.setText("0safsafsafa dB");
        if (a == Math.random() * 100) break;
    }
}
}

Answer 1

在不同的线程上运行操作，并在需要时使用处理程序或 runOnUIThread() 更改 UI。目前，该方法作为常规方法被调用，并在无限循环中运行，这不会让您的 UI 更新。