在我的应用程序中，我在布局上显示图像（picattach.png）。附上照片后，图像应替换为另一张（picattached.png）。我的问题是应用程序崩溃了：
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65541, result=-1, data=Intent { dat=content://media/external/images/media/9688 flg=0x1 }} to activity {com.peekatucorp.peekatu/com.peekatucorp.peekatu.MainActivity}: java.lang.NullPointerException
当我在选择图像的onActivityResult中尝试setImageResource以显示已选择图像时。
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.v("response", "Photo Selected");
if(requestCode == 5 && data != null && data.getData() != null){
b2.setImageResource(R.drawable.picattached);
Uri _uri = data.getData();
Log.v("response", "cp1/4");
if (_uri != null) {
//User has pick an image.
Cursor cursor = getActivity().getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
cursor.moveToFirst();
Log.v("response", "cp2/4");
//Link to the image
final String imageFilePath = cursor.getString(0);
Log.v("response", "cp3/4");
uploadMsgPic = imageFilePath;
Log.v("response", "4/4");
cursor.close();
media_attached=true;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
如果我删除：
b2.setImageResource(R.drawable.picattached);
该应用运行良好。
帮助。
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/form"
android:layout_alignParentTop="true"
android:choiceMode="none"
android:divider="#00000000"
android:dividerHeight="@dimen/zerosize"
android:footerDividersEnabled="false"
android:headerDividersEnabled="false"
android:listSelector="@android:color/transparent">
</ListView>
<RelativeLayout
android:id="@+id/form"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="40dp"
android:background="@drawable/inputbg" >
<EditText
android:id="@+id/cr_room_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/sendMessage"
android:layout_weight="3"
android:ems="10"
android:hint="Enter Message"
android:inputType="text" />
<ImageView
android:id="@+id/postpic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/picattach" />
<Button
android:id="@+id/sendMessage"
style="@style/SingleGradient"
android:layout_width="35dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
ImageView
ImageView b2 = (ImageView) v.findViewById(R.id.postpic);
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), 5);
}
});
Full StackTrace
11-15 13:45:17.256: E/AndroidRuntime(17431): FATAL EXCEPTION: main
11-15 13:45:17.256: E/AndroidRuntime(17431): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65541, result=-1, data=Intent { dat=content://media/external/images/media/8897 flg=0x1 }} to activity {com.peekatucorp.peekatu/com.peekatucorp.peekatu.MainActivity}: java.lang.NullPointerException
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.ActivityThread.deliverResults(ActivityThread.java:3367)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3410)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.ActivityThread.access$1100(ActivityThread.java:141)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1304)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.os.Handler.dispatchMessage(Handler.java:99)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.os.Looper.loop(Looper.java:137)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.ActivityThread.main(ActivityThread.java:5103)
11-15 13:45:17.256: E/AndroidRuntime(17431): at java.lang.reflect.Method.invokeNative(Native Method)
11-15 13:45:17.256: E/AndroidRuntime(17431): at java.lang.reflect.Method.invoke(Method.java:525)
11-15 13:45:17.256: E/AndroidRuntime(17431): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-15 13:45:17.256: E/AndroidRuntime(17431): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-15 13:45:17.256: E/AndroidRuntime(17431): at dalvik.system.NativeStart.main(Native Method)
11-15 13:45:17.256: E/AndroidRuntime(17431): Caused by: java.lang.NullPointerException
11-15 13:45:17.256: E/AndroidRuntime(17431): at com.peekatucorp.peekatu.ChatRoomFragment.onActivityResult(ChatRoomFragment.java:92)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:161)
11-15 13:45:17.256: E/AndroidRuntime(17431): at com.peekatucorp.peekatu.MainActivity.onActivityResult(MainActivity.java:98)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.Activity.dispatchActivityResult(Activity.java:5322)
11-15 13:45:17.256: E/AndroidRuntime(17431): at android.app.ActivityThread.deliverResults(ActivityThread.java:3363)
11-15 13:45:17.256: E/AndroidRuntime(17431): ... 11 more
11-15 13:45:35.896: E/SQLiteLog(17431): (3850) statement aborts at 34: [UPDATE cookies SET last_access_utc=? WHERE creation_utc=?] disk I/O error
11-15 13:45:35.916: E/SQLiteLog(17431): (1) statement aborts at 2: [COMMIT] cannot commit - no transaction is active
从开始到按钮监听器的完整chatfragment.java
package com.peekatucorp.peekatu;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;
import com.actionbarsherlock.app.SherlockFragment;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
/**
* Shows just a simple text
*
* @author sbaltes
*/
public class ChatRoomFragment extends SherlockFragment {
private String title;
private com.peekatucorp.peekatu.DiscussArrayAdapter adapter;
private ListView lv;
// private LoremIpsum ipsum;
private EditText editText1;
private static Random random;
private String selected_room;
private String last_message;
private Document responseDoc;
private String type;
private String user;
private String responseString;
private Timer timer;
private String last_inbox_message;
private ImageView b2;
String picurl=null;
String uploadMsgPic;
Boolean m_iAmVisible=false;
Boolean local=false;
Boolean media_attached=false;
//private SherlockFragmentActivity sfa;
public AbstractTabStackNavigationActivity navact;
public LayoutInflater inflaterr;
@Override
public void onPause (){
super.onPause();
Log.v("response", "Being Paused ");
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.v("response", "Photo Selected");
if(requestCode == 5 && data != null && data.getData() != null){
Uri _uri = data.getData();
Log.v("response", "cp1/4");
//b2.setImageResource(R.drawable.picattached);
if (_uri != null) {
//User has pick an image.
Cursor cursor = getActivity().getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
cursor.moveToFirst();
Log.v("response", "cp2/4");
//Link to the image
final String imageFilePath = cursor.getString(0);
Log.v("response", "cp3/4");
uploadMsgPic = imageFilePath;
Log.v("response", "4/4");
cursor.close();
media_attached=true;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onResume() {
super.onResume(); // setText() here
Log.v("response", "resumed");
/*if(!uploadMsgPic.equalsIgnoreCase("")){
b2.setImageDrawable(getResources().getDrawable(R.drawable.picattached));
} */
m_iAmVisible = true;
if(type.equalsIgnoreCase("1")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("main");
}else if(type.equalsIgnoreCase("2")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("");
}else if(type.equalsIgnoreCase("3")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("delete_conv",user);
}else if(type.equalsIgnoreCase("4")){
MainActivity m = (MainActivity)getActivity();
if(local)
m.changeMenu("online_map_local");
else
m.changeMenu("online_map_all");
//m.changeMenu("online_map_local");
}else if(type.equalsIgnoreCase("5")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("main");
}
// sfa = this.getSherlockActivity();
//this.getSupportActionBar().setTitle("asd");
// Intent i = this.getIntent();
//String type = "1";//i.getExtras().getString("type");
Log.v("response ", "messages type "+type);
refreshChat();
}
private Bitmap decodeFile(File f, int SIZE) throws IOException{
Bitmap b = null;
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
FileInputStream fis = new FileInputStream(f);
BitmapFactory.decodeStream(fis, null, o);
fis.close();
int scale = 1;
if (o.outHeight > SIZE || o.outWidth > SIZE) {
scale = (int)Math.pow(2, (int) Math.round(Math.log(SIZE /
(double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
}
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
fis = new FileInputStream(f);
b = BitmapFactory.decodeStream(fis, null, o2);
fis.close();
return b;
}
public void refreshChat(){
if(!m_iAmVisible)
return;
if(type.equalsIgnoreCase("1")){
SharedPreferences preferences = this.getActivity().getSharedPreferences("MyPreferences", this.getActivity().MODE_PRIVATE);
String selected_public = preferences.getString("selected_room", "Adult Lobby");
this.getSherlockActivity().getSupportActionBar().setTitle("Peek@u");
this.getSherlockActivity().getSupportActionBar().setSubtitle(selected_public);
getChatMessages();
}else if(type.equalsIgnoreCase("2")){
this.getSherlockActivity().getSupportActionBar().setTitle("Peek@u");
this.getSherlockActivity().getSupportActionBar().setSubtitle("Private Messages");
getInboxMessages();
}else if(type.equalsIgnoreCase("3")){
this.getSherlockActivity().getSupportActionBar().setTitle("Conversation");
this.getSherlockActivity().getSupportActionBar().setSubtitle("Username");
getUserMessages("1");
}else if(type.equalsIgnoreCase("4")){
this.getSherlockActivity().getSupportActionBar().setTitle("Online");
//this.getSherlockActivity().getSupportActionBar().setSubtitle("Username");
getUsers();
}else if(type.equalsIgnoreCase("5")){
SharedPreferences preferences = this.getActivity().getSharedPreferences("MyPreferences", this.getActivity().MODE_PRIVATE);
String selected_public = preferences.getString("selected_room", "Adult Lobby");
this.getSherlockActivity().getSupportActionBar().setTitle("Users in Room");
this.getSherlockActivity().getSupportActionBar().setSubtitle(selected_public);
//this.getSherlockActivity().getSupportActionBar().setSubtitle("Username");
getUsersRoom();
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.v("response", "In frag's on save instance state ");
outState.putString("response",responseString);
// outState.putS(outState);
//outState.putSerializable("starttime", lv);
}
public void waitncall(Boolean failed){
if(getActivity()==null)
return;
final SharedPreferences preferences = getActivity().getSharedPreferences("MyPreferences", Context.MODE_PRIVATE);
if(preferences==null)
return;
int refresh = Integer.parseInt(preferences.getString("loggedin_refresh", "3"));
if(failed){
Toast.makeText(this.getActivity(), "Connection Error, retrying in 10 seconds.", 1).show();
refresh=10;
}
timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
if(getActivity()!=null)
getActivity().runOnUiThread(new Runnable() {
public void run() {
Log.v("response", "timer");
//stuff that updates ui
timer.cancel();
refreshChat();
}
});
}
}, refresh*1000);//put here time 1000 milliseconds=1 second
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
uploadMsgPic = "";
m_iAmVisible = true;
final View v = inflater.inflate(R.layout.activity_discuss, container, false);
// setRetainInstance(true);
//last_message = "0";
inflaterr = inflater;
last_inbox_message = "99999999999";
/* if(type.equalsIgnoreCase("1")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("main");
}else if(type.equalsIgnoreCase("2")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("");
}else if(type.equalsIgnoreCase("3")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("delete_conv",user);
}else if(type.equalsIgnoreCase("4")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("online_map");
}else if(type.equalsIgnoreCase("5")){
MainActivity m = (MainActivity)getActivity();
m.changeMenu("");
}*/
final SharedPreferences preferences = this.getActivity().getSharedPreferences("MyPreferences", getActivity().MODE_PRIVATE);
if(responseString.length()>0 && preferences.getString("roomchanged", "notchanged").equalsIgnoreCase("notchanged")){
Log.v("response", "Resumed");
}else{
adapter = new DiscussArrayAdapter(inflater.getContext(), R.layout.listitem_discuss,Integer.parseInt(type),getTabStack());
last_message = "1";
}
SharedPreferences.Editor editor = preferences.edit();
//editor.putString("selected_room",");
editor.putString("roomchanged", "notchanged");
//responseString = "";
if(savedInstanceState!=null && false){
responseString = savedInstanceState.getString("response");
// return super.onCreateView(inflater, container, savedInstanceState);
}
// ((TextView) tv).setText(title);
Log.v("response ", "onCreate ");
Log.v("response ", "messages type ");
//--SAVE Data
// preferences = this.getSharedPreferences("MyPreferences", MODE_PRIVATE);
//--READ data
selected_room = preferences.getString("selected_room", "Lobby");
Log.v("response ", "messages type ");
//last_message = "1";
Intent i = this.getActivity().getIntent();
Log.v("response ", "messages type ");
//String type = "1";//i.getExtras().getString("type");
Log.v("response ", "messages type ");
Log.v("response ", "messages type "+type);
//setContentView(R.layout.activity_discuss);
if(type.equalsIgnoreCase("2") || type.equalsIgnoreCase("4") || type.equalsIgnoreCase("5")){
v.findViewById(R.id.form).setVisibility(View.GONE);
//r;
}
random = new Random();
// ipsum = new LoremIpsum();
getActivity().getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
lv = (ListView) v.findViewById(R.id.listView1);
if(lv==null)
Log.v("response ", "lv null");
//adapter = new DiscussArrayAdapter(inflater.getContext(), R.layout.listitem_discuss,Integer.parseInt(type),getTabStack());
if(adapter==null)
Log.v("response ", "adapter null");
lv.setAdapter(adapter);
Log.v("response ", "messages type ");
if(type.equalsIgnoreCase("2") ){
lv.setDivider(this.getResources().getDrawable(R.color.gray));
lv.setDividerHeight(1);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
OneComment clicked = adapter.getItem(position);
/* Fragment newFragment = CountingFragment.newInstance(mStackLevel);
// Add the fragment to the activity, pushing this transaction
// on to the back stack.
FragmentTransaction ft = sfa.getSupportFragmentManager().beginTransaction();
ft.replace(R.id.simple_fragment, newFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.addToBackStack(null);
ft.commit();*/
MainActivity m = (MainActivity)getActivity();
final TabInfo tab = m.getCurrentTabInfo();
final ChatRoomFragment fragment = new ChatRoomFragment().setType("3").setNAV(m).setUser(clicked.userid);
// fragment.setText(characters[position]);
// second, you push the fragment. It becomes visible and the up button is
// shown
m.pushFragment(tab, fragment);
}
});
}else if(type.equalsIgnoreCase("4") ||type.equalsIgnoreCase("5") ){
lv.setDivider(this.getResources().getDrawable(R.color.gray));
lv.setDividerHeight(1);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
OneComment clicked = adapter.getItem(position);
/* Fragment newFragment = CountingFragment.newInstance(mStackLevel);
// Add the fragment to the activity, pushing this transaction
// on to the back stack.
FragmentTransaction ft = sfa.getSupportFragmentManager().beginTransaction();
ft.replace(R.id.simple_fragment, newFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.addToBackStack(null);
ft.commit();*/
MainActivity m = (MainActivity)getActivity();
final TabInfo tab = m.getCurrentTabInfo();
final ProfileFragment fragment = new ProfileFragment().setUser(clicked.userid);
// fragment.setText(characters[position]);
// second, you push the fragment. It becomes visible and the up button is
// shown
m.pushFragment(tab, fragment);
}
});
}
else{
lv.setDivider(this.getResources().getDrawable(R.color.transparent));
lv.setDividerHeight(0);
}
Button b1 = (Button) v.findViewById(R.id.sendMessage);
b1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(!uploadMsgPic.equalsIgnoreCase("")){
Log.v("response","Pic in storage");
//PhotoUploadTask uploadpicmsg = new PhotoUploadTask();
//uploadpicmsg.execute();
sendPicMsg();
}else{
sendMessage();
}
// it was the 1st button
//sendMessage();
//Log.v("response","message sent");
//adapter.add(new OneComment(true, editText1.getText().toString()));
//editText1.setText("");
//lv.setSelection(adapter.getCount() - 1);
}
});
/*if(!uploadMsgPic.equalsIgnoreCase("")){
b2.setImageResource(R.drawable.picattached);
}else{
b2.setImageResource(R.drawable.picattach);
} */
b2 = (ImageView) v.findViewById(R.id.postpic);
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), 5);
答案 0 :(得分：0)
试试这个：
b2.setImageDrawable(getResources().getDrawable(R.drawable.picattached));
答案 1 :(得分：0)
该框架希望您首先调用它super.onActivityResult(requestCode, resultCode, data);并在之后应用您的请求处理if(requestCode == 5 && data != null && data.getData() != null){。如果不这样做会导致您NullPointerException。您应该像这样处理onActivityResult：
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.v("response", "Photo Selected");
if(requestCode == 5 && data != null && data.getData() != null){
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