Activity
package com.bpd.lemongroupchat.tabactivities.subactivity;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;
import com.bpd.lemongroupchat.R;
import com.bpd.lemongroupchat.utils.DialogUtils;
import com.bpd.lemongroupchat.utils.GraphicsUtil;
import com.bpd.lemongroupchat.utils.ImageHelper;
import com.quickblox.chat.QBChatService;
import com.quickblox.chat.model.QBDialog;
import com.quickblox.chat.model.QBDialogType;
import com.quickblox.core.QBEntityCallbackImpl;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.provider.MediaStore.Images;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class CreateOrUpdateGroupActivity extends Activity implements OnClickListener
{
Button createBtn;
ImageView groupImageIcon;
SharedPreferences sp;
String user="";
ImageView groupImage;
TextView inviteUser,groupCode;
EditText firstNameEdit;
//Spinner ageSpinner;
private static final int PICK_FROM_CAMERA = 1;
private static final int PICK_FROM_GALLERY = 2;
/************QuickBlox*************/
Bitmap imgBitmap=null;
String firstNameEditStr="",imagePath="";
protected ProgressDialog progressDialog;
ImageHelper imageHelper ;
private Bitmap photo=null;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.create_update_group_screen);
sp=this.getSharedPreferences("lemon_messenger", MODE_WORLD_READABLE);
user=sp.getString("CREATE_UPDATE", user);
Log.d("Profile", "1");
// set circle bitmap
groupImage = (ImageView) findViewById(R.id.groupPic);
groupImageIcon = (ImageView) findViewById(R.id.groupImgIcon);
createBtn = (Button) findViewById(R.id.createBtn);
inviteUser = (TextView) findViewById(R.id.inviteUser);
groupCode = (TextView) findViewById(R.id.groupCode);
firstNameEdit = (EditText) findViewById(R.id.firstNameEdit);
progressDialog = DialogUtils.getProgressDialog(this);
progressDialog.setMessage("Please wait...");
if(user.trim().equals("1"))
{
groupCode.setVisibility(View.VISIBLE);
createBtn.setText("Update");
}
else
{
groupCode.setVisibility(View.GONE);
createBtn.setText("Create");
}
createBtn.setOnClickListener(this);
groupImageIcon.setOnClickListener(this);
}
@Override
public void onClick(View v)
{
switch(v.getId())
{
case R.id.createBtn:
firstNameEditStr = firstNameEdit.getText().toString().trim();
if(user.trim().equals("1"))
{
Toast.makeText(getApplicationContext(), "Gorup Successfully Updated", Toast.LENGTH_LONG).show();
}
else
{
// if(imgBitmap!=null)
// {
if(!firstNameEditStr.trim().equalsIgnoreCase(""))
{
progressDialog.show();
createGroupChatMethod();
}
else
{
Toast.makeText(getApplicationContext(), "Please select a group name", Toast.LENGTH_LONG).show();
}
// }
// else
// {
// Toast.makeText(getApplicationContext(), "Please choose a group photo first", Toast.LENGTH_LONG).show();
// }
}
break;
case R.id.groupImgIcon:
selectImage();
break;
}
}
protected void createGroupChatMethod()
{
// code will be here
}
private void selectImage() {
final CharSequence[] options = { "Take Photo from Camera", "Choose from Gallery","Cancel" };
AlertDialog.Builder builder = new AlertDialog.Builder(CreateOrUpdateGroupActivity.this);
builder.setTitle("Add Photo!");
builder.setItems(options, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (options[item].equals("Take Photo from Camera"))
{
// call android default camera
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString());
// ******** code for crop image
// intent.putExtra("crop", "true");
// intent.putExtra("aspectX", 1);
// intent.putExtra("aspectY", 1);
// intent.putExtra("outputX", 120);
// intent.putExtra("outputY", 120);
try {
intent.putExtra("return-data", true);
startActivityForResult(intent, PICK_FROM_CAMERA);
} catch (ActivityNotFoundException e) {
// Do nothing for now
}
}
else if (options[item].equals("Choose from Gallery"))
{
// Intent intent = new Intent();
// // call android default gallery
// intent.setType("image/*");
// intent.setAction(Intent.ACTION_GET_CONTENT);
// // ******** code for crop image
// intent.putExtra("crop", "true");
// intent.putExtra("aspectX", 1);
// intent.putExtra("aspectY", 1);
// intent.putExtra("outputX", 120);
// intent.putExtra("outputY", 120);
//
// try {
//
// intent.putExtra("return-data", true);
// startActivityForResult(Intent.createChooser(intent,
// "Complete action using"), PICK_FROM_GALLERY);
//
// } catch (ActivityNotFoundException e) {
// // Do nothing for now
// }
// GET IMAGE FROM THE GALLERY
// Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
// intent.setType("image/*");
//
// Intent chooser = Intent.createChooser(intent, "Choose a Picture");
// startActivityForResult(chooser, PICK_FROM_GALLERY);
Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, PICK_FROM_GALLERY);
}
else if (options[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if(resultCode == RESULT_OK){
System.out.println("Data: " + data.getStringExtra("path"));
if(!data.getStringExtra("path").trim().equals(null))
{
System.out.println("Data: " + data.getStringExtra("path"));
if (requestCode == PICK_FROM_CAMERA) {
if (data != null) {
Bitmap photo1 = (Bitmap) data.getExtras().get("data");
// CALL THIS METHOD TO GET THE URI FROM THE BITMAP
Uri tempUri = getImageUri(getApplicationContext(), photo1);
// CALL THIS METHOD TO GET THE ACTUAL PATH
String pathCam= getRealPathFromURI(tempUri);
try {
photo = imageHelper.getScaledBitmap(pathCam);
} catch (IOException e) {
e.printStackTrace();
}
if(photo != null){
GraphicsUtil graphicUtil = new GraphicsUtil();
groupImage.setImageBitmap(graphicUtil.getCircleBitmap(photo, 150));
}
}
}
if (requestCode == PICK_FROM_GALLERY) {
if (data != null) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String path = cursor.getString(columnIndex);
cursor.close();
try {
photo = imageHelper.getScaledBitmap(path);
} catch (IOException e) {
e.printStackTrace();
}
if(photo != null){
GraphicsUtil graphicUtil = new GraphicsUtil();
groupImage.setImageBitmap(graphicUtil.getCircleBitmap(photo, 150));
}
}
}
}
else
{
System.out.println("Null Data: " + data.getStringExtra("path"));
}
}
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.PNG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_back, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.back_btn) {
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
Log Cat错误：
10-28 18:31:36.360: W/IInputConnectionWrapper(17544): showStatusIcon on inactive InputConnection
10-28 18:31:39.205: I/System.out(17544): Data: null
10-28 18:31:39.205: D/AndroidRuntime(17544): Shutting down VM
10-28 18:31:39.205: W/dalvikvm(17544): threadid=1: thread exiting with uncaught exception (group=0x41972700)
10-28 18:31:39.220: E/AndroidRuntime(17544): FATAL EXCEPTION: main
10-28 18:31:39.220: E/AndroidRuntime(17544): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://media/external/images/media/72092 (has extras) }} to activity {com.bpd.lemongroupchat/com.bpd.lemongroupchat.tabactivities.subactivity.CreateOrUpdateGroupActivity}: java.lang.NullPointerException
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.ActivityThread.deliverResults(ActivityThread.java:3500)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3543)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.ActivityThread.access$1200(ActivityThread.java:159)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.os.Looper.loop(Looper.java:176)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.ActivityThread.main(ActivityThread.java:5419)
10-28 18:31:39.220: E/AndroidRuntime(17544): at java.lang.reflect.Method.invokeNative(Native Method)
10-28 18:31:39.220: E/AndroidRuntime(17544): at java.lang.reflect.Method.invoke(Method.java:525)
10-28 18:31:39.220: E/AndroidRuntime(17544): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
10-28 18:31:39.220: E/AndroidRuntime(17544): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
10-28 18:31:39.220: E/AndroidRuntime(17544): at dalvik.system.NativeStart.main(Native Method)
10-28 18:31:39.220: E/AndroidRuntime(17544): Caused by: java.lang.NullPointerException
10-28 18:31:39.220: E/AndroidRuntime(17544): at com.bpd.lemongroupchat.tabactivities.subactivity.CreateOrUpdateGroupActivity.onActivityResult(CreateOrUpdateGroupActivity.java:244)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.Activity.dispatchActivityResult(Activity.java:5563)
10-28 18:31:39.220: E/AndroidRuntime(17544): at android.app.ActivityThread.deliverResults(ActivityThread.java:3496)
10-28 18:31:39.220: E/AndroidRuntime(17544): ... 11 more
错误是如何发生的？但是相同的代码适用于其他活动，但没有Menu
的概念答案 0 :(得分：1)
在对数据执行任何操作之前，应先检查。 确保请求代码与您发送的请求代码相等，并且结果代码等于ok，最后确保您的数据不为空
(requestCode==what_you_assign&&data!=null&&resultCode== Activity.RESULT_OK)
答案 1 :(得分：0)
data.getStringExtra("path").trim().equals(null)
此行存在问题，您无法在trim()上调用null（或任何其他方法）..由于您的控制台显示
数据：null
这意味着data.getStringExtra("path")会返回null，所以你要做的事情基本上归结为null.trim()，它会抛出一个NPE。只需检查data.getStringExtra("path")是否在if语句中返回null（删除对trim的调用）。
解决方案：替换
if(!data.getStringExtra("path").trim().equals(null))
通过
if(data != null && data.getExtras("data")!=null)
整个onActivityResult方法会更好地重写：
答案 2 :(得分：0)
您应首先确保数据不为空，然后data.getStringExtra("path")!=null。如果你试图确保它有文本，你可以在验证它不为空之后检查修剪过的字符串的长度。
答案 3 :(得分：0)
imageHelper = new ImageHelper(this);
ImageHelper是一个类，我忘了初具，因此它给了NPE。
感谢所有试图解决此问题的人。