Question

我有一个应用程序在Point崩溃：“新的下载程序（这个，mURL）;”：

    Downloader downloader = new Downloader(this, mURL);
    downloader.execute(0);

Downloader.java：

public class Downloader extends AsyncTask<Integer,Integer,String>{

private Fragment fragment;
private String mURL;
private Activity activity;

public Downloader(VertretungsplanFragment fr, String mURL)
{
    fragment = fr;
    this.mURL = mURL;
    this.activity = fr.getActivity();
}
@Override
protected String doInBackground(Integer... integers) {
[...]}
}

然后出现此错误（重要：它仅在Android＆lt; 3上崩溃）

java.lang.VerifyError的

这是错误日志:)

- startDownload：253正是Downloader downlaoder = new Downlaoder（this，mURL）;

02-25 15：40：55.405 619-619 / thems.vertretungsplan E / AndroidRuntime：FATAL EXCEPTION：main java.lang.VerifyError：thems.vertretungsplan.Downloader at thems.vertretungsplan.VertretungsplanFragment.startDownload（VertretungsplanFragment.java:253） at thems.vertretungsplan.VertretungsplanFragment.onCreateView（VertretungsplanFragment.java:58）在android.support.v4.app.Fragment.performCreateView（Fragment.java:1500）在android.support.v4.app.FragmentManagerImpl.moveToState（FragmentManager.java:927）在android.support.v4.app.FragmentManagerImpl.moveToState（FragmentManager.java:1104）在android.support.v4.app.BackStackRecord.run（BackStackRecord.java:682）在android.support.v4.app.FragmentManagerImpl.execPendingActions（FragmentManager.java:1467）在android.support.v4.app.FragmentManagerImpl.executePendingTransactions（FragmentManager.java:472）在android.support.v4.app.FragmentPagerAdapter.finishUpdate（FragmentPagerAdapter.java:141）在android.support.v4.view.ViewPager.populate（ViewPager.java:1068）在android.support.v4.view.ViewPager.populate（ViewPager.java:914）在android.support.v4.view.ViewPager.onMeasure（ViewPager.java:1436）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1017）在android.widget.LinearLayout.measureVertical（LinearLayout.java:386）在android.widget.LinearLayout.onMeasure（LinearLayout.java:309）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.FrameLayout.onMeasure（FrameLayout.java:250）在android.view.View.measure（View.java:8313）在android.widget.RelativeLayout.measureChildHorizontal（RelativeLayout.java:581）在android.widget.RelativeLayout.onMeasure（RelativeLayout.java:365）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.FrameLayout.onMeasure（FrameLayout.java:250）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.FrameLayout.onMeasure（FrameLayout.java:250）在android.view.View.measure（View.java:8313）在android.support.v4.widget.DrawerLayout.onMeasure（DrawerLayout.java:651）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.FrameLayout.onMeasure（FrameLayout.java:250）在android.view.View.measure（View.java:8313）在android.widget.LinearLayout.measureVertical（LinearLayout.java:531）在android.widget.LinearLayout.onMeasure（LinearLayout.java:309）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.FrameLayout.onMeasure（FrameLayout.java:250）在android.view.View.measure（View.java:8313）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:3138）在android.widget.FrameLayout.onMeasure（FrameLayout.java:250）在android.view.View.measure（View.java:8313）在android.view.ViewRoot.performTraversals（ViewRoot.java:839）在android.view.ViewRoot.handleMessage（ViewRoot.java:1859）在android.os.Handler.dispatchMessage（Handler.java:99）在android.os.Looper.loop（Looper.java:123）在android.app.ActivityThread.main（ActivityThread.java:3683） at java.lang.reflect.Method.invokeNative（Native Method）在java.lang.reflect.Method.invoke（Method.java:507）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:839）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:597）在dalvik.system.NativeStart.main（本地方法）

Answer 1

您必须从实例化片段的Activity中获取上下文。

context =new Context();
context = getActivity();

将此“context”作为上下文传递给asynctask构造函数。

Answer 2

片段是在android 3.0之后引入的，即API级别11

http://developer.android.com/reference/android/app/Fragment.html

Android：初始化新的AsyncTask（VerifyError）时应用程序崩溃

2 个答案: