Android应用程序在512mb ram mobile中崩溃

Question

您好我创建了一个Android应用程序并将其上传到Play商店，在该应用程序中我使用导航抽屉从一个活动导航到另一个活动。

我的应用程序工作正常，最多没有具有1 GB RAM的移动设备和最新的操作系统，如KitKat或Lollipop，但在512 MB RAM移动设备和Ice_Cream_Sandwich版本中应用程序在启动后关闭，说“不幸”该应用已停止“。只有少数手机出现此问题（我根据Play商店中的用户评论说这个）。

我的最低和最高SDK版本是

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="19" />

我没有将appcompat v7添加为库，如果我添加这个，我所有的Java类文件都显示错误。

现在我需要的是，我需要知道崩溃发生的原因以及如何解决这个问题。

我已经在SO中进行了搜索，但我无法找到我需要的正确解决方案。

我进入游戏商店的崩溃报告是

java.lang.NullPointerException

in android.graphics.drawable.InsetDrawable.isStateful


java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.imaginet.everwinmatriculation/com.imaginet.everwinmatriculation.MainActivity}:
java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2146)
at android.app.ActivityThread.access$700(ActivityThread.java:140)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:177)
at android.app.ActivityThread.main(ActivityThread.java:4947)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.graphics.drawable.InsetDrawable.isStateful(InsetDrawable.java:208)
at android.widget.ImageView.updateDrawable(ImageView.java:697)
at android.widget.ImageView.setImageDrawable(ImageView.java:410)
at android.support.v4.app.ActionBarDrawerToggleHoneycomb.setActionBarUpIndicator
(ActionBarDrawerToggleHoneycomb.java:62)at  

android.support.v4.app.ActionBarDrawerToggle$ActionBarDrawerToggleImplHC
.setActionBarUpIndicator(ActionBarDrawerToggle.java:134)
at android.support.v4.app.ActionBarDrawerToggle.setActionBarUpIndicator
(ActionBarDrawerToggle.java:400)
at android.support.v4.app.ActionBarDrawerToggle.syncState(ActionBarDrawerToggle.java:258)
at com.imaginet.everwinmatriculation.MainActivity.onPostCreate(MainActivity.java:291)
at android.app.Instrumentation.callActivityOnPostCreate(Instrumentation.java:1157)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2104)
... 11 more

我的MainActivity是......

public class MainActivity extends Activity {

private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;

// nav drawer title
private CharSequence mDrawerTitle;

// used to store app title
private CharSequence mTitle;

// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;

private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;

Context context;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //From this to - For Internet Connectivity Checking
    ConnectivityManager cn=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo nf=cn.getActiveNetworkInfo();
    if(nf != null && nf.isConnected()==true )
    {
        Toast.makeText(this, "You Have Active Internet Connection", Toast.LENGTH_LONG).show();
    }
    else
    {
        Toast.makeText(this, "Network Not Available", Toast.LENGTH_LONG).show();

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("You Don't Have Active Internet Connection, Click Ok To Exit")
        .setCancelable(false)
        .setPositiveButton("OK", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                //do things
                finish();
            }
        });
        AlertDialog alert = builder.create();
        alert.show();
    }

    //Upto this - For Internet Connectivity Checking
    mTitle = mDrawerTitle = getTitle();

    // load slide menu items
    navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

    // nav drawer icons from resources
    navMenuIcons = getResources()
            .obtainTypedArray(R.array.nav_drawer_icons);

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

    navDrawerItems = new ArrayList<NavDrawerItem>();

    // adding nav drawer items to array
    // Home
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
    // About Us
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
    // Principal Speech
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(3, -1)));
    // Circulars
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(4, -1),   

false, "22"));
    // Internal Events
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(6, -1)));
    //External Events
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(6, -1)));
    // Academic Calendar
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[6], navMenuIcons.getResourceId(6, -1)));
    // Admissions
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[7], navMenuIcons.getResourceId(7, -1)));
    // Competition
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[8], navMenuIcons.getResourceId(8, -1)));
    // Class Work
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[9], navMenuIcons.getResourceId(9, -1)));
    // Home Work
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[10], navMenuIcons.getResourceId(10, -1)));
    // Training & Test
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[11], navMenuIcons.getResourceId(11, -1)));
    // Examination
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[12], navMenuIcons.getResourceId(12, -1)));

    // Recycle the typed array
    navMenuIcons.recycle();

    mDrawerList.setOnItemClickListener(new SlideMenuClickListener());

    // setting the nav drawer list adapter
    adapter = new NavDrawerListAdapter(getApplicationContext(),
            navDrawerItems);
    mDrawerList.setAdapter(adapter);

    // enabling action bar app icon and behaving it as toggle button
    getActionBar().setDisplayHomeAsUpEnabled(true);
    getActionBar().setHomeButtonEnabled(true);

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, //nav menu toggle icon
            R.string.app_name, // nav drawer open - description for accessibility
            R.string.app_name // nav drawer close - description for accessibility
            ) {
        public void onDrawerClosed(View view) {
            getActionBar().setTitle(mTitle);
            // calling onPrepareOptionsMenu() to show action bar icons
            invalidateOptionsMenu();
        }

        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle(mDrawerTitle);
            // calling onPrepareOptionsMenu() to hide action bar icons
            invalidateOptionsMenu();
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);

    if (savedInstanceState == null) {
        // on first time display view for first nav item
        displayView(0);
    }

    //Following one line is added for onBackPressed Method
    mDrawerLayout.setFocusableInTouchMode(false);
}

/**
 * Slide menu item click listener
 * */
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // display view for selected nav drawer item
        displayView(position);
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // toggle nav drawer on selecting action bar app icon/title
    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
    // Handle action bar actions click
    switch (item.getItemId()) {
    case R.id.action_settings:
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

/* *
 * Called when invalidateOptionsMenu() is triggered
 */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    // if nav drawer is opened, hide the action items
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

/**
 * Diplaying fragment view for selected nav drawer list item
 * */
private void displayView(int position) {
    // update the main content by replacing fragments
    Fragment fragment = null;
    switch (position) {
    case 0:
        fragment = new HomeFragment();
        break;
    case 1:
        fragment = new AboutUsFragment();
        break;
    case 2:
        fragment = new PrincipalSpeechFragment();
        break;
    case 3:
        fragment = new CircularsFragment();
        break;
    case 4:
        fragment = new EventsFragment();
        break;
    case 5:
        fragment = new ExternalEventsFragment();
        break;
    case 6:
        fragment = new AC_CalenderFragment();
        break;
    case 7:
        fragment = new AdmissionsFragment();
        break;
    case 8:
        fragment = new CompetitionFragment();
        break;
    case 9:
        fragment = new ClassWorkFragment();
        break;
    case 10:
        fragment = new HomeWorkFragment();
        break;
    case 11:
        fragment = new TrainingTestFragment();
        break;
    case 12:
        fragment = new ExaminationFragment();
        break;

    default:
        break;
    }

    if (fragment != null) {
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
        .replace(R.id.frame_container, fragment).commit();

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    } else {
        // error in creating fragment
        Log.e("MainActivity", "Error in creating fragment");
    }
}

@Override
public void setTitle(CharSequence title) {
    mTitle = title;
    getActionBar().setTitle(mTitle);
}

/**
 * When using the ActionBarDrawerToggle, you must call it during
 * onPostCreate() and onConfigurationChanged()...
 */

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    mDrawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Pass any configuration change to the drawer toggls

    if (mDrawerLayout != null) {
        mDrawerToggle.onConfigurationChanged(newConfig);
    }
}

@Override
public void onBackPressed() {
    // TODO Auto-generated method stub
    //super.onBackPressed();

    //Upcmoning line is for confirm exiting
    new AlertDialog.Builder(this)
    .setMessage("Are you sure you want to exit?")
    .setCancelable(false)
    .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            MainActivity.this.finish();
        }
    })
    .setNegativeButton("No", null)
    .show();
}
}

Answer 1

我相信您的问题的解决方案是：

只需将此行添加到清单文件中的应用程序：

android:largeHeap="true"

所以你的Manifest文件应该应该是这样的：

<application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:theme="@android:style/Theme.Light.NoTitleBar.Fullscreen" >

        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.Light.NoTitleBar.Fullscreen" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
</application>