我想通过服务将logcat结果写入后台文件。我创建了一个服务,并使用以下代码来具有logcat结果。
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);
}
现在使用上述代码,我只能写一些日志,如果我删除" -d"选项,则该服务崩溃了。
现在,您必须将手机扎根于r/w。
在subtest.xml上授予read_logs的权限。然后将此代码写入活动的
的ongreate()String pname = getPackageName();
String[] CMDLINE_GRANTPERMS = { "su", "-c", null };
if (getPackageManager().checkPermission(android.Manifest.permission.READ_LOGS, pname) != 0) {
Log.d(TAG, "we do not have the READ_LOGS permission!");
if (android.os.Build.VERSION.SDK_INT >= 16) {
Log.d(TAG, "Working around JellyBeans 'feature'...");
try {
// format the commandline parameter
CMDLINE_GRANTPERMS[2] = String.format("pm grant %s android.permission.READ_LOGS", pname);
java.lang.Process p = Runtime.getRuntime().exec(CMDLINE_GRANTPERMS);
int res = p.waitFor();
Log.d(TAG, "exec returned: " + res);
if (res != 0)
throw new Exception("failed to become root");
} catch (Exception e) {
Log.d(TAG, "exec(): " + e);
Toast.makeText(getApplicationContext(), "Failed to obtain READ_LOGS permission", Toast.LENGTH_LONG).show();
}
}
} else
Log.d(TAG, "we have the READ_LOGS permission already!");
然后您的代码应该起作用,如果不是,则运行此操作
Process process = Runtime.getRuntime().exec("su -c logcat D");