java.lang.OutOfMemoryError：分配失败

Question

所以我用 viewPager 做了一个活动，好吧，它一viewPager.setAdapter工作就崩溃了。这是崩溃日志。

java.lang.OutOfMemoryError: Failed to allocate a 26488162 byte allocation with 16777216 free bytes and 24MB until OOM
                  at java.lang.StringFactory.newStringFromChars(Native Method)
                  at java.lang.AbstractStringBuilder.toString(AbstractStringBuilder.java:629)
                  at java.lang.StringBuffer.toString(StringBuffer.java:723)
                  at java.io.StringWriter.toString(StringWriter.java:100)
                  at android.util.Log.getStackTraceString(Log.java:345)
                  at com.android.internal.os.RuntimeInit.Clog_e(RuntimeInit.java:61)
                  at com.android.internal.os.RuntimeInit.-wrap0(RuntimeInit.java)
                  at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:86)
                  at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
                  at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)

这是活动的班级

public class SetupActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setup);
        ViewPager setupPager = (ViewPager) findViewById(R.id.setupViewpager); 
        SetupPagerAdapter setupPagerAdapter = new SetupPagerAdapter(getSupportFragmentManager());    
        setupPager.setAdapter(setupPagerAdapter);
   }
}

这是SetupPagerAdapter

public class SetupPagerAdapter extends FragmentPagerAdapter {
    public SetupPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        if(position == 0){
            return new SetupFragmentOne().newInstance();
        }
        return null;
    }

    @Override
    public int getCount() {
        return 1;
    }
}

这是SetupFragmentOne

public class SetupFragmentOne extends Fragment {
    public SetupFragmentOne newInstance() {
        SetupFragmentOne fragment = new SetupFragmentOne();
        return fragment;
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.setup_fragment_1, container);
        Typeface typeface = Typeface.createFromAsset(getContext().getAssets(),"coolvetica_rg.ttf");
        TextView tv = (TextView) view.findViewById(R.id.setupText1);
        tv.setTypeface(typeface);
        return view;
    }
}

Answer 1

在你的清单文件中尝试这个：

<application
android:allowBackup="true"
android:hardwareAccelerated="false"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:largeHeap="true"
android:supportsRtl="true"
android:theme="@style/AppTheme">

当 Java 虚拟机 (JVM) 由于内存空间不足而无法分配对象并且垃圾收集器无法释放某些空间时，就会出现此错误。

尝试改变这一行：

View view = inflater.inflate(R.layout.setup_fragment_1, container);

到

View view = inflater.inflate(R.layout.setup_fragment_1, container,false);

要解决内存不足错误...更好的方法：

如果您使用大量位图或可绘制图像...您应该将不同分辨率的图像放在不同的文件夹中...hdpi、xhdpi 等...请参阅： https: //developer.android.com/guide/practices/screens_support .html

当活动被破坏时，也解除绑定您的绘图..以便垃圾收集器可以释放内存

 private void unbindDrawables(View view)
{
        if (view.getBackground() != null)
        {
                view.getBackground().setCallback(null);
        }
        if (view instanceof ViewGroup && !(view instanceof AdapterView))
        {
                for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++)
                {
                        unbindDrawables(((ViewGroup) view).getChildAt(i));
                }
                ((ViewGroup) view).removeAllViews();
        }
}

另请参阅：https://androidactivity.wordpress.com/2011/09/24/solution-for-outofmemoryerror-bitmap-size-exceeds-vm-budget/