【小知识点总结】保存android日志logcat到文件中

LogCat存储在circular memory buffers中。

1、可以通过命令来导出Log：

引用 adb logcat -d > logcat.txt

2、在程序中获取Log的方法：

添加日志读取权限：

代码如下：
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);
}
//可以写到TextView中
TextView tv = (TextView)findViewById(R.id.textView1);
tv.setText(log.toString());
//也可以写到app指定的文件中去
String logPath = Environment.getExternalStorageDirectory().getPath() + "/logcat.log";
LogUtils.f(logPath, log.toString(), false);
} catch (IOException e) {
}
}
}

LogUtils代码：
public final class LogUtils {
public static void f(String logPath, String logData, boolean override) {
BufferedWriter writer = null;
try {
writer = new BufferedWriter(new FileWriter(logPath, !override));
if (!override) {
writer.append(logData);
} else {
writer.write(logData);
}
writer.newLine();
} catch (FileNotFoundException e) {
e(new LogUtils(), e.toString());
} catch (IOException e) {
e(new LogUtils(), e.toString());
} finally {
try {
if (writer != null) {
writer.flush();
writer.close();
}
} catch (Exception e2) {
e(new LogUtils(), e2.toString());
}
}
}
}

释放资源代码：
if (bufferedReader != null)
{
try
{
bufferedReader.close();
} catch (IOException e)
{
e.printStackTrace();
}
}
if (process != null)
{
process.destroy();

}

其他相关链接：Android的log保存到文件上查看

更多相关文章

随机推荐