七零部落格
思则大道至简，疑则谜团重重！
思则大道至简，疑则谜团重重！
每个android应用都是由一个Application和多个activity或者server构成.应用启动时,会首先启动Application.在Application的onCreate方法中调用
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Thread.setDefaultUncaughtExceptionHandler(handler);
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就可以捕获导致应用崩溃的错误信息了.
首先应用要有读写sd卡权限
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<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
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自定义一个Application,并在AndroidManifest.xml中使用这个Application
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<application
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android:name=".MyApplication">
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...
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</application>
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public class MyApplication extends Application {
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private static final String LOG_DIR = Environment
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.getExternalStorageDirectory().getAbsolutePath() + "/oldfeel/log/";
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private static final String LOG_NAME = getCurrentDateString() + ".txt";
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private ArrayList<Activity> list = new ArrayList<Activity>();
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@Override
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public void onCreate() {
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super.onCreate();
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Thread.setDefaultUncaughtExceptionHandler(handler);
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}
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UncaughtExceptionHandler handler = new UncaughtExceptionHandler() {
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@Override
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public void uncaughtException(Thread thread, Throwable ex) {
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writeErrorLog(ex);
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Intent intent = new Intent(getApplicationContext(),
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CollapseActivity.class);
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intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
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startActivity(intent);
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exit();
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}
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};
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/**
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* 打印错误日志
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*
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* @param ex
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*/
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protected void writeErrorLog(Throwable ex) {
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String info = null;
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ByteArrayOutputStream baos = null;
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PrintStream printStream = null;
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try {
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baos = new ByteArrayOutputStream();
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printStream = new PrintStream(baos);
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ex.printStackTrace(printStream);
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byte[] data = baos.toByteArray();
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info = new String(data);
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data = null;
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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try {
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if (printStream != null) {
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printStream.close();
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}
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if (baos != null) {
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baos.close();
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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Log.d("example", "崩溃信息
" + info);
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File dir = new File(LOG_DIR);
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if (!dir.exists()) {
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dir.mkdirs();
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}
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File file = new File(dir, LOG_NAME);
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try {
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FileOutputStream fileOutputStream = new FileOutputStream(file, true);
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fileOutputStream.write(info.getBytes());
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fileOutputStream.close();
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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/**
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* 获取当前日期
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*
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* @return
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*/
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private static String getCurrentDateString() {
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String result = null;
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd",
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Locale.getDefault());
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Date nowDate = new Date();
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result = sdf.format(nowDate);
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return result;
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}
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/**
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* Activity关闭时，删除Activity列表中的Activity对象
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*/
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public void removeActivity(Activity a) {
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list.remove(a);
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}
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/**
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* 向Activity列表中添加Activity对象
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*/
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public void addActivity(Activity a) {
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list.add(a);
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}
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/**
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* 关闭Activity列表中的所有Activity
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*/
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public void exit() {
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for (Activity activity : list) {
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if (null != activity) {
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activity.finish();
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}
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}
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// 杀死该应用进程
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android.os.Process.killProcess(android.os.Process.myPid());
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}
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}
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系统错误后要还是要提示用户系统错误.这个是崩溃activity,
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<activity
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android:name="com.example.test.CollapseActivity"
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android:theme="@android:style/Theme.Holo.Dialog.MinWidth" >
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</activity>
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:gravity="center"
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android:orientation="horizontal" >
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<Button
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android:id="@+id/collapse_restart"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:layout_weight="1.0"
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android:text="重启应用" />
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<Button
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android:id="@+id/collapse_exit"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:layout_weight="1.0"
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android:text="退出应用" />
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</LinearLayout>
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public class CollapseActivity extends Activity {
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private Button btnRestart, btnExit;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.collapse_activity);
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setTitle("应用崩溃了");
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btnRestart = (Button) findViewById(R.id.collapse_restart);
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btnExit = (Button) findViewById(R.id.collapse_exit);
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btnRestart.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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Intent intent = new Intent(getApplicationContext(),
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MainActivity.class);
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intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
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startActivity(intent);
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finish();
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}
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});
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btnExit.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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finish();
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}
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});
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}
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}
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