这是完整的解决方案（几乎：我省略了 UI 布局和按钮处理） - 源自大量实验以及其他与此过程中出现的问题相关的各种帖子。
你需要做很多事情：
- 在您的应用程序子类中处理 uncaughtException。
- 捕获异常后，启动一个新的活动来要求用户发送
一个日志。
- 从 logcat 的文件中提取日志信息并写入您的
自己的文件。
- 启动电子邮件应用程序，将您的文件作为附件提供。
- 清单：过滤您的活动以被您的异常处理程序识别。
- （可选）设置 Proguard 以去除 Log.d() 和 Log.v()。
现在，这里是详细信息：
(1 & 2) 处理 uncaughtException，开始发送日志活动：
public class MyApplication extends Application
{
public void onCreate ()
{
// Setup handler for uncaught exceptions.
Thread.setDefaultUncaughtExceptionHandler (new Thread.UncaughtExceptionHandler()
{
@Override
public void uncaughtException (Thread thread, Throwable e)
{
handleUncaughtException (thread, e);
}
});
}
public void handleUncaughtException (Thread thread, Throwable e)
{
e.printStackTrace(); // not all Android versions will print the stack trace automatically
Intent intent = new Intent ();
intent.setAction ("com.mydomain.SEND_LOG"); // see step 5.
intent.setFlags (Intent.FLAG_ACTIVITY_NEW_TASK); // required when starting from Application
startActivity (intent);
System.exit(1); // kill off the crashed app
}
}
(3) 提取日志（我把它放在我的 SendLog 活动中）：
private String extractLogToFile()
{
PackageManager manager = this.getPackageManager();
PackageInfo info = null;
try {
info = manager.getPackageInfo (this.getPackageName(), 0);
} catch (NameNotFoundException e2) {
}
String model = Build.MODEL;
if (!model.startsWith(Build.MANUFACTURER))
model = Build.MANUFACTURER + " " + model;
// Make file name - file must be saved to external storage or it wont be readable by
// the email app.
String path = Environment.getExternalStorageDirectory() + "/" + "MyApp/";
String fullName = path + <some name>;
// Extract to file.
File file = new File (fullName);
InputStreamReader reader = null;
FileWriter writer = null;
try
{
// For Android 4.0 and earlier, you will get all app's log output, so filter it to
// mostly limit it to your app's output. In later versions, the filtering isn't needed.
String cmd = (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) ?
"logcat -d -v time MyApp:v dalvikvm:v System.err:v *:s" :
"logcat -d -v time";
// get input stream
Process process = Runtime.getRuntime().exec(cmd);
reader = new InputStreamReader (process.getInputStream());
// write output stream
writer = new FileWriter (file);
writer.write ("Android version: " + Build.VERSION.SDK_INT + "\n");
writer.write ("Device: " + model + "\n");
writer.write ("App version: " + (info == null ? "(null)" : info.versionCode) + "\n");
char[] buffer = new char[10000];
do
{
int n = reader.read (buffer, 0, buffer.length);
if (n == -1)
break;
writer.write (buffer, 0, n);
} while (true);
reader.close();
writer.close();
}
catch (IOException e)
{
if (writer != null)
try {
writer.close();
} catch (IOException e1) {
}
if (reader != null)
try {
reader.close();
} catch (IOException e1) {
}
// You might want to write a failure message to the log here.
return null;
}
return fullName;
}
(4) 启动一个电子邮件应用程序（也在我的 SendLog Activity 中）：
private void sendLogFile ()
{
String fullName = extractLogToFile();
if (fullName == null)
return;
Intent intent = new Intent (Intent.ACTION_SEND);
intent.setType ("plain/text");
intent.putExtra (Intent.EXTRA_EMAIL, new String[] {"log@mydomain.com"});
intent.putExtra (Intent.EXTRA_SUBJECT, "MyApp log file");
intent.putExtra (Intent.EXTRA_STREAM, Uri.parse ("file://" + fullName));
intent.putExtra (Intent.EXTRA_TEXT, "Log file attached."); // do this so some email clients don't complain about empty body.
startActivity (intent);
}
(3 & 4) 这是 SendLog 的样子（不过，您必须添加 UI）：
public class SendLog extends Activity implements OnClickListener
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature (Window.FEATURE_NO_TITLE); // make a dialog without a titlebar
setFinishOnTouchOutside (false); // prevent users from dismissing the dialog by tapping outside
setContentView (R.layout.send_log);
}
@Override
public void onClick (View v)
{
// respond to button clicks in your UI
}
private void sendLogFile ()
{
// method as shown above
}
private String extractLogToFile()
{
// method as shown above
}
}
(5) 清单：
<manifest xmlns:android="http://schemas.android.com/apk/res/android" ... >
<!-- needed for Android 4.0.x and eariler -->
<uses-permission android:name="android.permission.READ_LOGS" />
<application ... >
<activity
android:name="com.mydomain.SendLog"
android:theme="@android:style/Theme.Dialog"
android:textAppearance="@android:style/TextAppearance.Large"
android:windowSoftInputMode="stateHidden">
<intent-filter>
<action android:name="com.mydomain.SEND_LOG" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
(6) 设置 Proguard：
在 project.properties 中，更改配置行。您必须指定“优化”，否则 Proguard 将不会删除 Log.v() 和 Log.d() 调用。
proguard.config=${sdk.dir}/tools/proguard/proguard-android-optimize.txt:proguard-project.txt
在 proguard-project.txt 中，添加以下内容。这告诉 Proguard 假设 Log.v 和 Log.d 没有副作用（即使它们在写入日志后有副作用），因此可以在优化期间删除：
-assumenosideeffects class android.util.Log {
public static int v(...);
public static int d(...);
}
就是这样！如果您对此有任何改进建议，请告诉我，我可能会对此进行更新。