超簡單獲取APP異常,寫入SD卡文件
阿新 • • 發佈:2018-12-08
首先看看結構心裡有點數,沒錯就寫兩個類就好
先寫CrashHandler
public class CrashHandler implements Thread.UncaughtExceptionHandler { private static CrashHandler sInstance = null; private Thread.UncaughtExceptionHandler mDefaultHandler; private Context mContext; // 儲存手機資訊和異常資訊 private Map<String, String> mMessage = new HashMap<>(); public static CrashHandler getInstance() { if (sInstance == null) { synchronized (CrashHandler.class) { if (sInstance == null) { synchronized (CrashHandler.class) { sInstance = new CrashHandler(); } } } } return sInstance; } private CrashHandler() { } /** * 初始化預設異常捕獲 * * @param context context */ public void init(Context context) { mContext = context; // 獲取預設異常處理器 mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler(); // 將此類設為預設異常處理器 Thread.setDefaultUncaughtExceptionHandler(this); } @Override public void uncaughtException(Thread t, Throwable e) { if (!handleException(e)) { // 未經過人為處理,則呼叫系統預設處理異常,彈出系統強制關閉的對話方塊 if (mDefaultHandler != null) { mDefaultHandler.uncaughtException(t, e); } } else { // 已經人為處理,系統自己退出 try { Thread.sleep(1000); } catch (InterruptedException e1) { e1.printStackTrace(); } System.exit(1); } } /** * 是否人為捕獲異常 * * @param e Throwable * @return true:已處理 false:未處理 */ private boolean handleException(Throwable e) { if (e == null) {// 異常是否為空 return false; } new Thread() {// 在主執行緒中彈出提示 @Override public void run() { Looper.prepare(); Toast.makeText(mContext, "捕獲到異常", Toast.LENGTH_SHORT).show(); Looper.loop(); } }.start(); collectErrorMessages(); saveErrorMessages(e); return false; } /** * 1.收集錯誤資訊 */ private void collectErrorMessages() { PackageManager pm = mContext.getPackageManager(); try { PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES); if (pi != null) { String versionName = TextUtils.isEmpty(pi.versionName) ? "null" : pi.versionName; String versionCode = "" + pi.versionCode; mMessage.put("versionName", versionName); mMessage.put("versionCode", versionCode); } // 通過反射拿到錯誤資訊 Field[] fields = Build.class.getFields(); if (fields != null && fields.length > 0) { for (Field field : fields) { field.setAccessible(true); try { mMessage.put(field.getName(), field.get(null).toString()); } catch (IllegalAccessException e) { e.printStackTrace(); } } } } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } } /** * 2.儲存錯誤資訊 * * @param e Throwable */ private void saveErrorMessages(Throwable e) { StringBuilder sb = new StringBuilder(); for (Map.Entry<String, String> entry : mMessage.entrySet()) { String key = entry.getKey(); String value = entry.getValue(); sb.append(key).append("=").append(value).append("\n"); } Writer writer = new StringWriter(); PrintWriter pw = new PrintWriter(writer); e.printStackTrace(pw); pw.close(); String result = writer.toString(); sb.append(result); String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA).format(new Date()); String fileName = "crash.log"; // 有無SD卡 if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { String path = Environment.getExternalStorageDirectory().getPath() + "/crash/"; File dir = new File(path); if (!dir.exists()) dir.mkdirs(); FileOutputStream fos = null; try { fos = new FileOutputStream(path + fileName); fos.write(sb.toString().getBytes()); } catch (Exception e1) { e1.printStackTrace(); } finally { if (fos != null) { try { fos.close(); } catch (IOException e1) { e1.printStackTrace(); } } } } } }
然後就可以寫EHApplication
public class EHApplication extends Application {
private static Context context;
@Override
public void onCreate() {
super.onCreate();
CrashHandler.getInstance().init(this);
context = this;
}
public static Context getContext() {
return context;
}
}
注意清單檔案,,重點
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
//許可權很重要
<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme" android:name=".EHApplication">//注意這裡,name是必須的 <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application>
然後Activity寫個錯
public class MainActivity extends AppCompatActivity {
private List<String> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(ActivityCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE)
==PackageManager.PERMISSION_GRANTED){
}else{
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},100);
}
}
public void click(View v){
Log.i("dt",list.size()+"");
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode==100){
if (grantResults[0]==PackageManager.PERMISSION_GRANTED){
Log.i("dt",list.size()+"");
}
}
}
}