您好我正在尝试从联系人那里获取电话号码以发送MMS。我正在联系不，但我无法在 EditText View中设置该值。但我可以使用联系人显示该值Toast。我正在接受例外。
06-25 22:29:39.101: E/AndroidRuntime(22406): FATAL EXCEPTION: main
06-25 22:29:39.101: E/AndroidRuntime(22406): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://com.android.contacts/contacts/lookup/0r423-2D45452D.2292i6960c86a891de3df/626 flg=0x1 (has extras) }} to activity {com.RajusLabs.IAmHere/com.RajusLabs.IAmHere.MMS}: java.lang.NullPointerException
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.ActivityThread.handleSendResult(ActivityThread.java:2578)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.ActivityThread.access$2000(ActivityThread.java:117)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:965)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.os.Handler.dispatchMessage(Handler.java:99)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.os.Looper.loop(Looper.java:130)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.ActivityThread.main(ActivityThread.java:3687)
06-25 22:29:39.101: E/AndroidRuntime(22406): at java.lang.reflect.Method.invokeNative(Native Method)
06-25 22:29:39.101: E/AndroidRuntime(22406): at java.lang.reflect.Method.invoke(Method.java:507)
06-25 22:29:39.101: E/AndroidRuntime(22406): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
06-25 22:29:39.101: E/AndroidRuntime(22406): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
06-25 22:29:39.101: E/AndroidRuntime(22406): at dalvik.system.NativeStart.main(Native Method)
06-25 22:29:39.101: E/AndroidRuntime(22406): Caused by: java.lang.NullPointerException
06-25 22:29:39.101: E/AndroidRuntime(22406): at com.RajusLabs.IAmHere.MMS.onActivityResult(MMS.java:123)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.Activity.dispatchActivityResult(Activity.java:3908)
06-25 22:29:39.101: E/AndroidRuntime(22406): at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
06-25 22:29:39.101: E/AndroidRuntime(22406): ... 11 more
MMS.java的源代码
public class MMS extends Activity {
private static final int CAMERA_REQUEST = 500;
private ImageView imageView;
Intent i = null;
Bitmap photo;
EditText toNo,toMsg;
String MMSNo,MMSmsg;
ImageButton contacts;
Uri bmpUri = null;
final int PICK_CONTACT = 2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.mms);
//full screen
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.imageView = (ImageView) findViewById(R.id.imgLoad);
Button bt = (Button) findViewById(R.id.btCam);
Button picok = (Button) findViewById(R.id.bPicOk);
ImageButton contacts = (ImageButton)findViewById(R.id.btContacts);
final EditText toNo = (EditText)findViewById(R.id.etMMSNo);
final EditText toMsg = (EditText) findViewById(R.id.etMMSMsg);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent, CAMERA_REQUEST);
}
});
picok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(photo != null)
{
String pathofBmp = Images.Media.insertImage(getContentResolver(), photo,"title", null);
bmpUri = Uri.parse(pathofBmp);
}
MMSNo = toNo.getText().toString();
MMSmsg = toMsg.getText().toString();
if(bmpUri != null && MMSNo != null)
{
Intent i = new Intent(Intent.ACTION_SEND);
i.putExtra("address",MMSNo);
i.putExtra("sms_body",MMSmsg);
i.putExtra(Intent.EXTRA_STREAM,bmpUri);
i.setType("image/*");
startActivity(i);
}
}
});
contacts.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
toNo.setText("");
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent, PICK_CONTACT);
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch(requestCode) {
case (PICK_CONTACT) : {
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
if (c.moveToFirst()) {
String id = c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts._ID));
String hasPhone = c.getString(c.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));
if (hasPhone.equalsIgnoreCase("1")) {
Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID
+ " = " + id, null, null);
phones.moveToFirst();
String cNumber = phones.getString(phones.getColumnIndex("data1"));
String name=phones.getString(phones.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
System.out.println("NAME:"+name+"\n NUMBER:"+cNumber);
Toast.makeText(getApplicationContext(),"Selected Contact Name:"+name+" and no: "+cNumber, Toast.LENGTH_LONG).show();
toNo.setText(cNumber);
}
else
{
Toast.makeText(getApplicationContext(),"Mobile Number not found.\nPlease enter Mobile Number by Manual", Toast.LENGTH_LONG).show();
}
break;
}
}
case (CAMERA_REQUEST): {
photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
}
}
代码行号：toNo.setText（cNumber）;
答案 0 :(得分：3)
删除
final EditText
这
final EditText toNo = (EditText)findViewById(R.id.etMMSNo);
应该是：
toNo = (EditText)findViewById(R.id.etMMSNo);
因为你已经将它声明为你班级的成员变量。在final EditText中将onCreate()置于其前面使其范围仅对onCreate()有效，因此在onActivityResult中为空。如果这有意义的话！
顺便说一句，我也会为toMsg执行此操作，否则如果您尝试在onCreate()之外使用它，则会遇到同样的问题。
详细了解变量范围here。
答案 1 :(得分：0)
我建议你：
- 如果您声明的“EditText toNo”之一没有必要从代码中删除它。
- 编辑文本引发的编译错误是因为当您声明一个最终变量时，它将是不可变的，因此您无法为其设置新值。
尝试删除：
最终EditText toNo 并初始化你在onCreate
之外创建的toNo