运行我的应用时出现此错误:
12-14 12:04:42.088: E/AndroidRuntime(331): FATAL EXCEPTION: main
12-14 12:04:42.088: E/AndroidRuntime(331): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.awesomefilebuilderwidget/com.example.awesomefilebuilderwidget.GridViewAdapter}: java.lang.InstantiationException: com.example.awesomefilebuilderwidget.GridViewAdapter
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1746)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1854)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1041)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.os.Handler.dispatchMessage(Handler.java:99)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.os.Looper.loop(Looper.java:150)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.ActivityThread.main(ActivityThread.java:4333)
12-14 12:04:42.088: E/AndroidRuntime(331): at java.lang.reflect.Method.invokeNative(Native Method)
12-14 12:04:42.088: E/AndroidRuntime(331): at java.lang.reflect.Method.invoke(Method.java:507)
12-14 12:04:42.088: E/AndroidRuntime(331): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
12-14 12:04:42.088: E/AndroidRuntime(331): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
12-14 12:04:42.088: E/AndroidRuntime(331): at dalvik.system.NativeStart.main(Native Method)
12-14 12:04:42.088: E/AndroidRuntime(331): Caused by: java.lang.InstantiationException: com.example.awesomefilebuilderwidget.GridViewAdapter
12-14 12:04:42.088: E/AndroidRuntime(331): at java.lang.Class.newInstanceImpl(Native Method)
12-14 12:04:42.088: E/AndroidRuntime(331): at java.lang.Class.newInstance(Class.java:1409)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.Instrumentation.newActivity(Instrumentation.java:1040)
12-14 12:04:42.088: E/AndroidRuntime(331): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1738)
12-14 12:04:42.088: E/AndroidRuntime(331): ... 11 more
这是我的GridViewAdapter类:
package com.example.awesomefilebuilderwidget;
IMPORTS
public class GridViewAdapter extends BaseAdapter {
private Context Context;
// Keep all Images in array list
public ArrayList<Integer> drawables = new ArrayList<Integer>();
CheckBox mCheckBox=null;
// Constructor
public GridViewAdapter(Context c){
Context = c;
Log.d("GridViewAdapter", "Constructor is set");
drawables.add(R.drawable.pattern1);
Log.d("GridViewAdapter", "pattern1 added");
drawables.add(R.drawable.pattern2);
Log.d("GridViewAdapter", "pattern2 added");
drawables.add(R.drawable.trashcan);
Log.d("GridViewAdapter", "trashcan added");
drawables.add(R.drawable.ic_launcher);
Log.d("GridViewAdapter", "ic_launcher added");
}
public void setCheckBox(CheckBox checkbox){
mCheckBox=checkbox;
}
@Override
// How many items are in the data set represented by this Adapter
public int getCount() {
return drawables.size();
}
@Override
// Get the data item associated with the specified position in the
// data set
public Object getItem(int position) {
return drawables.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public boolean isSdReadable() {
boolean mExternalStorageAvailable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// We can read and write the media
mExternalStorageAvailable = true;
Log.i("isSdReadable", "External storage card is readable.");
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// We can only read the media
Log.i("isSdReadable", "External storage card is readable.");
mExternalStorageAvailable = true;
} else {
// Something else is wrong. It may be one of many other
// states, but all we need to know is we can neither read nor write
mExternalStorageAvailable = false;
}
return mExternalStorageAvailable;
}
public Bitmap getThumbnail() {
final String APP_PATH_SD_CARD = "/TEST/";
final String APP_THUMBNAIL_PATH_SD_CARD = "thumbnails";
String filename = "AFBWIcon.png";
String fullPath = Environment.getExternalStorageDirectory().getAbsolutePath() + APP_PATH_SD_CARD + APP_THUMBNAIL_PATH_SD_CARD;
Bitmap thumbnail = null;
// Look for the file on the external storage
try {
if (isSdReadable() == true) {
thumbnail = BitmapFactory.decodeFile(fullPath + "/" + filename);
}
} catch (Exception e) {
Log.e("getThumbnail() on external storage", e.getMessage());
}
// If no file on external storage, look in internal storage
if (thumbnail == null) {
try {
File filePath = Context.getFileStreamPath(filename);
FileInputStream fi = new FileInputStream(filePath);
thumbnail = BitmapFactory.decodeStream(fi);
} catch (Exception ex) {
Log.e("getThumbnail() on internal storage", ex.getMessage());
}
}
return thumbnail;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Try to reuse the views
ImageView view = (ImageView) convertView;
@SuppressWarnings("unused")
boolean checked = (mCheckBox==null)?false:(((CheckBox) mCheckBox).isChecked());
// if convert view is null then create a new instance else reuse it
if (view == null) {
view = new ImageView(Context);
Log.d("GridViewAdapter", "new imageView added");
}
if(checked = true){
isSdReadable();
try {
FileInputStream in = Context.openFileInput("BitmapImage");
// Load back the image file to confirm it works
Bitmap bitmap = BitmapFactory.decodeStream(in);
view.setImageBitmap(bitmap);
in.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// getThumbnail();
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
Log.e("GridView", "Icons not for use");
}
view.setImageResource(drawables.get(position));
view.setScaleType(ImageView.ScaleType.CENTER_CROP);
view.setLayoutParams(new android.widget.GridView.LayoutParams(70, 70));
view.setTag(String.valueOf(position));
return view;
}
}
这是我的清单:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.awesomefilebuilderwidget"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<receiver android:name="com.example.awesomefilebuilderwidget.AFBWidget" android:label="@string/app_name">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
</intent-filter>
<meta-data android:name="android.appwidget.provider"
android:resource="@xml/widget_stuff"/>
</receiver>
<activity android:name="com.example.awesomefilebuilderwidget.WidgetConfig" android:label="@string/app_name">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
</intent-filter>
</activity>
<activity android:name="com.example.awesomefilebuilderwidget.Drag_and_Drop_App" android:label="@string/app_name" android:windowSoftInputMode="stateHidden" android:screenOrientation="portrait"></activity>
<activity android:name="com.example.awesomefilebuilderwidget.AppInfoAdapter" android:label="@string/app_name" ></activity>
<activity android:name="com.example.awesomefilebuilderwidget.Feedback" android:label="@string/app_name" ></activity>
<activity android:name="com.example.awesomefilebuilderwidget.GridView" android:label="@string/app_name" ></activity>
<activity android:name="com.example.awesomefilebuilderwidget.SendMessageActivity" android:label="@string/app_name" ></activity>
<activity android:name="com.example.awesomefilebuilderwidget.Utilities" android:label="@string/app_name" ></activity>
<activity android:name="com.example.awesomefilebuilderwidget.Personalize" android:label="@string/app_name" ></activity>
<activity android:name="com.example.awesomefilebuilderwidget.SwipeDetector" android:label="@string/app_name"></activity>
<activity android:name="com.example.awesomefilebuilderwidget.GridViewAdapter" android:label="@string/app_name"></activity>
</application>
</manifest>
我在SOF上看了一下但是没有找到任何有助于解决这个问题的东西。 导致此错误的原因是什么?
请注意,在我收到此错误之前,此工作正常
答案 0 :(得分:0)
从清单中删除适配器类引用。
您只在清单
中添加活动类答案 1 :(得分:0)
它崩溃是因为您在清单中指定了一个适配器类,删除它并且您没有应用程序的默认启动活动 你需要在清单中使用这样的东西:
<activity android:name=".put your started activity name here"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
指定您想要的活动