经过我的搜索，我找到了以下代码来获取崩溃日志。
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);
}
但是我应该在哪里添加代码，以便在我的应用程序崩溃时获得崩溃报告。
此外，我想在应用程序崩溃后将其发送电子邮件或发送到服务器，但如何调用发送电子邮件/ HTTP POST方法的操作？
请给予建议，提前致谢。
处理崩溃日志的最佳方法是创建一个 UncaughtExceptionHandler，并根据您的需求进行处理。创建一个 BaseActivity 类，并将所有活动与其扩展，并将这些代码放入 BaseActivity 类中。
private Thread.UncaughtExceptionHandler handleAppCrash =
new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread thread, Throwable ex) {
Log.e("error", ex.toString());
//send email here
}
};
只需在BaseActivity的onCreate()方法中启用它，方法是使用：
Thread.setDefaultUncaughtExceptionHandler(handleAppCrash);
所以，现在无论何时应用程序崩溃，uncaughtException()都会被调用，然后您需要相应地处理该崩溃。
我建议您使用ARCAhttps://github.com/ACRA/acra。
请在build.gradle中加入arca--自10月29日起，它采用了Apache 2.0许可证。
compile 'ch.acra:acra:4.9.0' //TODO: Apache 2.0 license https://github.com/ACRA/acra
@ReportsCrashes(mailTo = "someone@somewhere.com",
customReportContent = { ReportField.APP_VERSION_CODE, ReportField.APP_VERSION_NAME, ReportField.ANDROID_VERSION, ReportField.PHONE_MODEL, ReportField.CUSTOM_DATA, ReportField.STACK_TRACE, ReportField.LOGCAT },
mode = ReportingInteractionMode.TOAST,
resToastText = R.string.resToastText) //you get to define resToastText
public class MyApplication extends Application {
然后在同一Application类中覆盖以下方法：
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
// The following line triggers the initialization of ACRA
ACRA.init(this);
}
在我的情况下，我有一个bug，在我的手机上无法复制。我只想从一个孤独的测试人员那里获得堆栈跟踪。我找到的最简单的方法是将它复制到用户的剪贴板中，并要求他们将其发送给我。以下是代码：
import android.app.Application;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* Copies the stack trace the exception that is causing your application to crash into the clip board.
* Ask your testers to paste it into an email / text message to you.
*
* @author Stuart Clark
*/
public class CrashDebugApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread thread, Throwable e) {
// Get the stack trace.
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
// Add it to the clip board and close the app
ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Stack trace", sw.toString());
clipboard.setPrimaryClip(clip);
System.exit(1);
}
});
}
}
然后在Android清单文件中设置android:name属性，例如：
<application android:icon="@mipmap/ic_launcher" android:name=".CrashDebugApplication">
public class UnexpectedCrashSaver implements Thread.UncaughtExceptionHandler {
private Thread.UncaughtExceptionHandler defaultUEH;
private Context app = null;
public UnexpectedCrashSaver(Context app) {
this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
this.app = app;
}
public void uncaughtException(Thread t, Throwable e) {
StackTraceElement[] arr = e.getStackTrace();
String report = e.toString()+"\n\n";
report += "--------- Stack trace ---------\n\n";
for (int i=0; i<arr.length; i++) {
report += " "+arr[i].toString()+"\n";
}
report += "-------------------------------\n\n";
App.instance().toastShort("saving!");
report += "--------- Cause ---------\n\n";
Throwable cause = e.getCause();
if(cause != null) {
report += cause.toString() + "\n\n";
arr = cause.getStackTrace();
for (int i=0; i<arr.length; i++) {
report += " "+arr[i].toString()+"\n";
}
}
report += "-------------------------------\n\n";
try {
FileOutputStream trace = app.openFileOutput("stack.trace",
Context.MODE_PRIVATE);
trace.write(report.getBytes());
trace.close();
} catch(IOException ioe) {
// ...
}
defaultUEH.uncaughtException(t, e);
}
}
2- 在Application类的onCreate()方法中添加以下代码：
Thread.setDefaultUncaughtExceptionHandler(new UnexpectedCrashSaver(this));
如果您没有应用程序类，请将以下代码添加到所有活动的onCreate()方法中：（如果您有BaseActivity，请将其放在BaseActivity的onCreate()方法中）
Thread.setDefaultUncaughtExceptionHandler(new UnexpectedCrashSaver(ActivityName.this));
3- 创建一个名为checkbox.xml的布局：
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<CheckBox
android:id="@+id/checkbox"
style="?android:attr/textAppearanceMedium"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp" />
</FrameLayout>
4- 将以下方法添加到你的 MainActivity 类中：
private void checkForCrash()
{
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
boolean crash_never_ask_again = preferences.getBoolean("crash_never_ask_again", false);
if(crash_never_ask_again)//Previously user check the checkbox of never ask me again about sending crash dialog
return;
String dialog_message = "In the last run, the program encountered an error, we apologize for this, you can kindly send us the error information to fix this error in future updates.";
String button_positive_text = "Send";
String button_negative_text = "Close";
String checkbox_text = "Never ask again";
String email = "crashreport@example.com";
String line;
String trace="";
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(MainActivity.this.openFileInput("stack.trace")));
while((line = reader.readLine()) != null) {
trace += line+"\n";
}
} catch(FileNotFoundException fnfe) {
// ...
} catch(IOException ioe) {
// ...
}
if(trace.length() < 10)//We didn't have any crash
return;
View checkBoxView = View.inflate(this, R.layout.checkbox, null);
CheckBox checkBox = checkBoxView.findViewById(R.id.checkbox);
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("checkbox_checked",true);
editor.apply();
}
});
checkBox.setText(checkbox_text);
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setCancelable(true);
//builder.setIcon(R.drawable.ic_setting);
builder.setMessage(dialog_message);
builder.setView(checkBoxView);
builder.setCancelable(false);
String finalTrace = trace;
builder.setPositiveButton(button_positive_text, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent sendIntent = new Intent(Intent.ACTION_SEND);
String subject = "Error report";
String body = "Mail this to appdeveloper@gmail.com: " + "\n" + finalTrace + "\n";
sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[] {email});
sendIntent.putExtra(Intent.EXTRA_TEXT, body);
sendIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
sendIntent.setType("message/rfc822");
MainActivity.this.startActivity(Intent.createChooser(sendIntent, "Title:"));
MainActivity.this.deleteFile("stack.trace");
}
});
builder.setNegativeButton(button_negative_text, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
MainActivity.this.deleteFile("stack.trace");
boolean checkbox_checked = preferences.getBoolean("checkbox_checked", false);
if(checkbox_checked)
{
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("crash_never_ask_again",true);
editor.apply();
}
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
}
5- 在MainActivity的onCreate方法中调用第4步创建的方法：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
checkForCrash();
setContentView(R.layout.activity_main);
//...
这就是全部啦！
BaseActivity。public class BaseActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_base);
Thread.setDefaultUncaughtExceptionHandler(handleCrash);
}
private Thread.UncaughtExceptionHandler handleCrash =
new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread thread, Throwable e) {
Log.e("error", e.toString());
//send email here
}
};
}
BaseActivity 正在扩展 AppCompatActivity。而 YourActivity 正在扩展 BaseActivity。public class YourActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_your);
//Basically your activity is just extending BaseActivity, and all exceptions are
//are taken care of in BaseActivity.
}
}
BaseActivity中被检测到，然后您可以将错误报告发送到您的电子邮件。