将android logcat数据写入文件

Question

我想在用户想要收集日志时将Android logcat转储到文件中.通过adb工具,我们可以使用日志将日志重定向到文件adb logcat -f filename,但是如何以编程方式执行此操作？

Answer 1

以下是读取日志的示例.

您可以将其更改为写入文件而不是写入文件TextView.

需要许可AndroidManifest:

<uses-permission android:name="android.permission.READ_LOGS" />

码:

public class LogTest extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    try {
      Process process = Runtime.getRuntime().exec("logcat -d");
      BufferedReader bufferedReader = new BufferedReader(
      new InputStreamReader(process.getInputStream()));

      StringBuilder log = new StringBuilder();
      String line;
      while ((line = bufferedReader.readLine()) != null) {
        log.append(line);
      }
      TextView tv = (TextView) findViewById(R.id.textView1);
      tv.setText(log.toString());
    } catch (IOException e) {
    }
  }
}

Answer 2

Logcat可以直接写入文件:

public static void saveLogcatToFile(Context context) {    
    String fileName = "logcat_"+System.currentTimeMillis()+".txt";
    File outputFile = new File(context.getExternalCacheDir(),fileName);
    @SuppressWarnings("unused")
    Process process = Runtime.getRuntime().exec("logcat -f "+outputFile.getAbsolutePath());
}

有关logcat的更多信息:请参阅http://developer.android.com/tools/debugging/debugging-log.html