我onActivityResult从mediastore图像选择返回,我可以使用以下内容获取图像的URI:
Uri selectedImage = data.getData();
将其转换为字符串可以得到:
content://media/external/images/media/47
或者路径给出:
/external/images/media/47
但是我似乎无法找到将其转换为绝对路径的方法,因为我想将图像加载到位图而不必将其复制到某处.我知道这可以使用URI和内容解析器完成,但这似乎在重新启动手机时中断,我想MediaStore在重新启动之间不会保持其编号相同.
我正在尝试从本机数据库中获取其显示名称和电话号码(任意或所有)的联系人列表.有许多方法可以通过对手机数据库的多个查询来获取此信息,但这会带来相当大的开销.
这是我一直在研究的查询,但结果却是
Uri uri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] { ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER};
String selection = ContactsContract.Contacts.HAS_PHONE_NUMBER + " = '1'";
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
Cursor people = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder);
int index_id = people.getColumnIndex(ContactsContract.Contacts._ID);
int indexName = people.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);
int indexNumber = people.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
people.moveToFirst();
do {
String _id = people.getString(index_id);
String name = people.getString(indexName);
String number = people.getString(indexNumber);
// Do work...
} while (people.moveToNext());
这是由此产生的错误.
E/AndroidRuntime(21549): Caused …这是我的代码,我希望保存图像按钮只是将图像保存到图库.
package com.nk_apps.hip.hop.lyric.wallpapers;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class Wallpapers extends Activity implements OnClickListener {
}
ImageView display;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.wallpapers);
display = (ImageView) findViewById(R.id.IVDisplay);
ImageView image1 = (ImageView) findViewById(R.id.IVimage1);
ImageView image2 = (ImageView) findViewById(R.id.IVimage2);
ImageView image3 = (ImageView) findViewById(R.id.IVimage3);
ImageView image4 = (ImageView) findViewById(R.id.IVimage4);
ImageView image5 = (ImageView) findViewById(R.id.IVimage5);
ImageView image6 = (ImageView) findViewById(R.id.IVimage6);
ImageView image7 = (ImageView) findViewById(R.id.IVimage7);
ImageView image8 …您好，我想从联系人中选择一个电话号码并将其插入到 EditText 中
但它在片段中不起作用我在活动中使用它并且它有效。请你能帮我我应该如何改变它<谢谢
public class Encrypt extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.encrypt, null);
phoneNumberDisplay = (EditText) v.findViewById(R.id.editTextPhoneNumber);
contactsButton=(Button)v.findViewById(R.id.buttonContacts);
contactsButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(v==contactsButton){
Intent intent=new Intent(Intent.ACTION_PICK,Contacts.CONTENT_URI);
intent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_TYPE);
startActivityForResult(intent, 1);
}
}
});
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
Uri ur = data.getData();
Cursor c = managedQuery(ur, null, null, null, null);
if (c.moveToFirst()) {
String s …