无法使用联系人选取器

Question

我是android编程新手。 我无法从我的活动中调用联系人选择器。 我已经提到很多教程，相应地格式化了我的代码，但没有得到任何结果。

为MainActivity.java的代码是： -

package com.example.intents; 


import android.app.Activity; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.Contacts; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 

public class MainActivity extends Activity { 


    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 


    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     MenuInflater mi=getMenuInflater(); 
     mi.inflate(R.menu.main, 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.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    public void invokeForRes(View view) 
    { 
     Intent in=new Intent(Intent.ACTION_PICK,Contact.Contacts.CONTENT_URI); 

     startActivityForResult(in, 1); 
    } 

} 

请帮我....... 预先感谢您。

Answer 1

使用ContactsContract.Contacts.CONTENT_URI而不是Contact.Contacts.CONTENT_URI。后者是在Android 1.x的触点提供者，并且它是由ContactsContract在Android 2.0的取代，在2009年年底

/*** 
    Copyright (c) 2008-2012 CommonsWare, LLC 
    Licensed under the Apache License, Version 2.0 (the "License"); you may not 
    use this file except in compliance with the License. You may obtain a copy 
    of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required 
    by applicable law or agreed to in writing, software distributed under the 
    License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
    OF ANY KIND, either express or implied. See the License for the specific 
    language governing permissions and limitations under the License. 

    From _The Busy Coder's Guide to Android Development_ 
    http://commonsware.com/Android 
*/ 

package com.commonsware.android.rotation.bundle; 

import android.app.Activity; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.ContactsContract; 
import android.view.View; 
import android.widget.Button; 

public class RotationBundleDemo extends Activity { 
    static final int PICK_REQUEST=1337; 
    Button viewButton=null; 
    Uri contact=null; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    viewButton=(Button)findViewById(R.id.view); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, 
            Intent data) { 
    if (requestCode == PICK_REQUEST) { 
     if (resultCode == RESULT_OK) { 
     contact=data.getData(); 
     viewButton.setEnabled(true); 
     } 
    } 
    } 

    public void pickContact(View v) { 
    Intent i= 
     new Intent(Intent.ACTION_PICK, 
        ContactsContract.Contacts.CONTENT_URI); 

    startActivityForResult(i, PICK_REQUEST); 
    } 

    public void viewContact(View v) { 
    startActivity(new Intent(Intent.ACTION_VIEW, contact)); 
    } 

    @Override 
    protected void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 

    if (contact != null) { 
     outState.putParcelable("contact", contact); 
    } 
    } 

    @Override 
    protected void onRestoreInstanceState(Bundle state) { 
    super.onRestoreInstanceState(state); 

    contact=state.getParcelable("contact"); 
    viewButton.setEnabled(contact != null); 
    } 
} 

释放（从this sample project）