到目前为止所做的是按下“添加联系人”按钮电话簿打开，然后选择一个在Edittext View中显示的联系人，当另一个按钮“添加更多联系人”被按下时，另一个编辑 - 文本视图显示在顶部，我可以再次从电话簿中选择联系人。 但我面临的问题是，当我为第二个编辑文本视图选择联系人时，它会替换先前编辑文本的联系人。在这种情况下该怎么做。 用于显示编辑文本视图的代码
public class MainActivity extends Activity {
private Button btn_cntct;
public int REQUESTCODE = 1;
private LinearLayout layoutLinear;
private Button btn_addmore_cntct;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// defining button elements for picking contacts from phone-book
btn_cntct = (Button) findViewById(R.id.bpickperson);
btn_cntct.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
// using Intent for fetching contacts from phone-book
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE);
startActivityForResult(intent, REQUESTCODE);
}
});
layoutLinear = (LinearLayout) findViewById(R.id.mLayout);
btn_addmore_cntct = (Button) findViewById(R.id.baddmorecontacts);
btn_addmore_cntct.setOnClickListener(OnClick());
EditText editview = new EditText(this);
editview.setText("Add more");
}
private OnClickListener OnClick() {
// TODO Auto-generated method stub
// changing return type "null" to "new OnClickListner"
return new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
EditText tab = new EditText(getApplicationContext());
tab.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// adding (0) to display edit-text view on the top
layoutLinear.addView(tab, 0);
tab.requestFocus();
}
};
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (data != null) {
Uri uri = data.getData();
Log.i("data", uri.toString());
if (uri != null) {
Cursor c = null;
try {
c = getContentResolver()
.query(uri,
new String[] {
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.CommonDataKinds.Phone.TYPE },
null, null, null);
if (c != null && c.moveToFirst()) {
String name = c.getString(0);
String number = c.getString(1);
int type = c.getInt(2);
showSelectedNumber(name, number, type);
}
} finally {
if (c != null) {
c.close();
}
}
}
}
}
public void showSelectedNumber(String name, String number, int type) {
EditText userNumber = (EditText) findViewById(R.id.edittext);
String typeNumber = (String) ContactsContract.CommonDataKinds.Phone
.getTypeLabel(getResources(), type, "");
userNumber.setText(name + ": " + number + " " + typeNumber);
}
我的logcat是
01-21 14:29:01.766: W/IInputConnectionWrapper(590): showStatusIcon on inactive InputConnection
01-21 14:29:04.327: I/data(590): content://com.android.contacts/data/1
01-21 14:29:04.387: I/layoutLinear is not null(590): not null
01-21 14:29:04.387: I/edittext is null(590): null
01-21 14:29:04.437: D/AndroidRuntime(590): Shutting down VM
01-21 14:29:04.437: W/dalvikvm(590): threadid=1: thread exiting with uncaught exception (group=0x40015560)
01-21 14:29:04.477: E/AndroidRuntime(590): FATAL EXCEPTION: main
01-21 14:29:04.477: E/AndroidRuntime(590): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.contacts/data/1 flg=0x1 (has extras) }} to activity {com.example.zzz1/com.example.zzz1.MainActivity}: java.lang.NullPointerException
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.ActivityThread.access$2000(ActivityThread.java:117)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.os.Handler.dispatchMessage(Handler.java:99)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.os.Looper.loop(Looper.java:123)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-21 14:29:04.477: E/AndroidRuntime(590): at java.lang.reflect.Method.invokeNative(Native Method)
01-21 14:29:04.477: E/AndroidRuntime(590): at java.lang.reflect.Method.invoke(Method.java:507)
01-21 14:29:04.477: E/AndroidRuntime(590): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-21 14:29:04.477: E/AndroidRuntime(590): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-21 14:29:04.477: E/AndroidRuntime(590): at dalvik.system.NativeStart.main(Native Method)
01-21 14:29:04.477: E/AndroidRuntime(590): Caused by: java.lang.NullPointerException
01-21 14:29:04.477: E/AndroidRuntime(590): at com.example.zzz1.MainActivity.showSelectedNumber(MainActivity.java:145)
01-21 14:29:04.477: E/AndroidRuntime(590): at com.example.zzz1.MainActivity.onActivityResult(MainActivity.java:115)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.Activity.dispatchActivityResult(Activity.java:3908)
01-21 14:29:04.477: E/AndroidRuntime(590): at android.app.ActivityThread.deliverResults(ActivityThread.java:2528)
01-21 14:29:04.477: E/AndroidRuntime(590): ... 11 more
答案 0 :(得分：1)
您应该做的是每次创建新的EditText时都必须为创建的EditText提供ID，如下所示：
private int id = 1 ;
private OnClickListener OnClick() {
// TODO Auto-generated method stub
// changing return type "null" to "new OnClickListner"
return new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
EditText tab = new EditText(getApplicationContext());
tab.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// here you set the ID
tab.setId(id);
// and increment it
id++;
// adding (0) to display edit-text view on the top
layoutLinear.addView(tab,0);
tab.requestFocus();
}
};
}
然后在showSelectedNumber方法中，您应该从LinearLayout获取EditText并通过您最近创建的EditText的id获取它，如下所示：
public void showSelectedNumber(String name, String number, int type) {
if(layoutLinear== null ) {
Log.i("layoutLinear is null" , "null");
}else {
Log.i("layoutLinear is not null" , "not null");
}
EditText userNumber = (EditText) layoutLinear.getChildAt(0);
if(userNumber == null ) {
Log.i("edittext is null" , "null");
}else {
Log.i("edittext is not null" , "not null");
}
String typeNumber = (String) ContactsContract.CommonDataKinds.Phone
.getTypeLabel(getResources(), type, "");
userNumber.setText(name + ": " + number + " " + typeNumber);
}
希望有助于此。
答案 1 :(得分：0)
在showSelectedNumber方法中，EditText userNumber始终是第一个EditText，因为您尝试通过R.id.edittext找到它。这就是为什么第一个EditText的内容会被更改的原因。
您应该在id中为新添加的EditText分配新的OnClickListener。
EditText tab = new EditText(getApplicationContext());
// For example
tab.setId( A_NEW_ID );
然后，在showSelectedNumber，
EditText userNumber = (EditText) findViewById( A_NEW_ID );
=============================================== ===
或者，您可以在列表中添加新添加的EditText。然后在每次添加新联系人时使用最后一个。
答案 2 :(得分：0)
在类变量中存储引用，然后在setText（）时将此EditText传递给方法。
public void showSelectedNumber(String name, String number, int type,EditText et) {
EditText userNumber = et;
String typeNumber = (String) ContactsContract.CommonDataKinds.Phone
.getTypeLabel(getResources(), type, "");
userNumber.setText(name + ": " + number + " " + typeNumber);
}