An example of managing system resources using ContentProvider in Android
- 2021-07-09 09:16:15
- OfStack
Examples of ContentProvider administrative contacts:
package com.android.xiong.getsystemcontentprovidertest;
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.CommonDataKinds.StructuredName;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.RawContacts;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.LayoutParams;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button bt1, bt2;
private ExpandableListView exp1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt1 = (Button) findViewById(R.id.bt1);
bt1.setOnClickListener(new LookPresonClick());
bt2 = (Button) findViewById(R.id.bt2);
bt2.setOnClickListener(new AddPersonClick());
}
class AddPersonClick implements OnClickListener {
@Override
public void onClick(View v) {
// Get mulberry text box in program interface
String name = ((EditText) findViewById(R.id.ed1)).getText()
.toString();
String phone = ((EditText) findViewById(R.id.ed2)).getText()
.toString();
String email = ((EditText) findViewById(R.id.ed3)).getText()
.toString();
// Create 1 Empty ContentValue
ContentValues values = new ContentValues();
// Toward RawContacts.CONTNT_URI Execute 1 Null value insertion
// The purpose is to get the returned rawContactId
Uri rawContactsUri = getContentResolver().insert(
RawContacts.CONTENT_URI, values);
long rawContactId = ContentUris.parseId(rawContactsUri);
values.clear();
values.put(Data.RAW_CONTACT_ID, rawContactId);
// Setting content types
values.put(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE);
// Set the contact name
values.put(StructuredName.GIVEN_NAME, name);
// To contacts Uri Add a contact name
getContentResolver().insert(
android.provider.ContactsContract.Data.CONTENT_URI, values);
values.clear();
values.put(Data.RAW_CONTACT_ID, rawContactId);
values.put(Data.MIMETYPE, Phone.CONTENT_ITEM_TYPE);
// Set the phone number of the contact
values.put(Phone.NUMBER, phone);
// Set the phone type
values.put(Phone.TYPE, Phone.TYPE_MOBILE);
// Call the contact person Uri Add a phone number
getContentResolver().insert(
android.provider.ContactsContract.Data.CONTENT_URI, values);
values.clear();
values.put(Data.RAW_CONTACT_ID, rawContactId);
values.put(Data.MIMETYPE, Email.CONTENT_ITEM_TYPE);
// Set the contact's email Address
values.put(Email.DATA, email);
// Settings email Type of
values.put(Email.TYPE, Email.TYPE_WORK);
getContentResolver().insert(
android.provider.ContactsContract.Data.CONTENT_URI, values);
Toast.makeText(MainActivity.this, " Add contact information successfully ", Toast.LENGTH_LONG)
.show();
}
}
class LookPresonClick implements OnClickListener {
@Override
public void onClick(View v) {
// Define two List To encapsulate system contact information, specify the contact's phone, email Particulars, etc
final ArrayList<String> names = new ArrayList<String>();
final ArrayList<ArrayList<String>> details = new ArrayList<ArrayList<String>>();
// Use ContentResolver Find contact data
Cursor cursor = getContentResolver().query(
ContactsContract.Contacts.CONTENT_URI, null, null, null,
null);
// Traversal result Get all contact information of the system
while (cursor.moveToNext()) {
// Get Contacts ID
String contactid = cursor.getString(cursor
.getColumnIndex(ContactsContract.Contacts._ID));
// Get the name of the contact
String name = cursor
.getString(cursor
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
names.add(name);
// Use ContentResolver Find a contact's phone number
Cursor phones = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID
+ "= ?", new String[] { contactid }, null);
ArrayList<String> detail = new ArrayList<String>();
// Traverse the query results to get multiple phones for this contact
while (phones.moveToNext()) {
// Get the phone number column in the result of the query
String phoneNumber = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
detail.add(" The telephone number is: " + phoneNumber);
}
phones.close();
// Use ContentResolver Find a contact's E-mail Address
Cursor emails = getContentResolver().query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Email.CONTACT_ID
+ " =?", new String[] { contactid }, null);
// Traverse the query results to get multiple of the contact email Address
while (emails.moveToNext()) {
// Get the results of the query email Data of columns in addresses
String emailAddress = emails
.getString(emails
.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
detail.add("email Yes :" + emailAddress);
}
emails.close();
details.add(detail);
}
cursor.close();
// Loading result.xml View represented by interface layout
View resultDialog = getLayoutInflater().inflate(R.layout.result,
null);
exp1 = (ExpandableListView) resultDialog.findViewById(R.id.exp1);
// Create 1 A ExpandableListAdapter Object
ExpandableListAdapter adapter = new BaseExpandableListAdapter() {
@Override
public boolean isChildSelectable(int groupPosition,
int childPosition) {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
TextView text = getTextVeiw();
text.setText(getGroup(groupPosition).toString());
return text;
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return names.size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return names.get(groupPosition);
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return details.get(groupPosition).size();
}
private TextView getTextVeiw() {
AbsListView.LayoutParams lp = new LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 64);
TextView textview = new TextView(MainActivity.this);
textview.setLayoutParams(lp);
textview.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textview.setPadding(36, 0, 0, 0);
textview.setTextSize(20);
return textview;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
TextView textview = getTextVeiw();
textview.setText(getChild(groupPosition, childPosition)
.toString());
return textview;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return details.get(groupPosition).get(childPosition);
}
};
exp1.setAdapter(adapter);
// Use dialog boxes to display query results
new AlertDialog.Builder(MainActivity.this).setView(resultDialog)
.setPositiveButton(" Determine ", null).show();
}
}
@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;
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<EditText
android:id="@+id/ed1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint=" Enter a contact name "/>
<EditText
android:id="@+id/ed2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint=" Enter Contact Phone "/>
<EditText
android:id="@+id/ed3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint=" Enter a contact email"/>
<Button
android:id="@+id/bt2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=" Add Contact Information "/>
<Button
android:id="@+id/bt1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=" View Contacts " />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ExpandableListView
android:id="@+id/exp1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ExpandableListView>
</LinearLayout>
Managing Multimedia Content Using ContentProvider
Android provides Uri for multimedia:
1. MediaStore.Audio.Mdia.EXTERNAL_CONTENT_URI: Audio files stored on external devices
2. MediaStore.Audio.Mdia.INTERNAL_CONTENT_URI: Audio files stored inside the mobile phone
3. MediaStore. Images. Mdia.EXTERNAL_CONTENT_URI: Picture file stored on external device
4. MediaStore.Images.Mdia.INTERNAL_CONTENT_URI: Image file stored on internal device
5. MediaStore.Video.Mdia.EXTERNAL_CONTENT_URI: Audio files stored on external devices
6. MediaStore. Video. Mdia.INTERNAL_CONTENT_URI: Audio files stored on internal devices
Example:
package com.example.mediaprovidertest;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore.Images.Media;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends Activity {
private Button bt1, bt2;
private ListView list1;
ArrayList<String> names = new ArrayList<String>();
ArrayList<String> descs = new ArrayList<String>();
ArrayList<String> filenames = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt1 = (Button) findViewById(R.id.bt1);
bt2 = (Button) findViewById(R.id.bt2);
list1 = (ListView) findViewById(R.id.list);
bt1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Empty names , desc , fileName The original data in the collection
names.clear();
descs.clear();
filenames.clear();
// Pass ContentResolver Query all picture information
Cursor curos = getContentResolver().query(
Media.EXTERNAL_CONTENT_URI, null, null, null, null);
while (curos.moveToNext()) {
// Gets the name of the picture display
String name = curos.getString(curos
.getColumnIndex(Media.DISPLAY_NAME));
// Get the details of the picture,
String desc = curos.getString(curos
.getColumnIndex(Media.DESCRIPTION));
// Location data to save the picture name
byte[] data = curos.getBlob(curos
.getColumnIndex(Media.DATA));
// Add the picture name to the names In the collection
names.add(name);
// Add a picture description to the desc In the collection
descs.add(desc);
// Add the picture save path to the fileNames In the collection
filenames.add(new String(data, 0, data.length - 1));
}
// Create 1 A List The elements of the collection are map
List<Map<String, Object>> listitems = new ArrayList<Map<String, Object>>();
// Will names , descs Data of two collection objects is converted to map Set
for (int i = 0; i < names.size(); i++) {
Map<String, Object> listitem = new HashMap<String, Object>();
listitem.put("name", names.get(i));
listitem.put("desc", descs.get(i));
listitems.add(listitem);
}
SimpleAdapter simple = new SimpleAdapter(MainActivity.this,
listitems, R.layout.items, new String[] { "name",
"desc" }, new int[] { R.id.txt1, R.id.txt2 });
list1.setAdapter(simple);
}
});
list1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// Loading view.xml The interface layout represents the view
View view = getLayoutInflater().inflate(R.layout.view, null);
// Get viewDialog Medium ImageView Component
ImageView image1 = (ImageView) view.findViewById(R.id.image1);
// Settings image Displays the specified picture
image1.setImageBitmap(BitmapFactory.decodeFile(filenames
.get(arg2)));
// Use the dialog box to display the picture that the user clicked
new AlertDialog.Builder(MainActivity.this).setView(view)
.setPositiveButton(" Determine ", null).show();
}
});
bt2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Create ContentValues Object, ready to insert data
ContentValues values = new ContentValues();
values.put(Media.DISPLAY_NAME, "jinta");
values.put(Media.DESCRIPTION, " Golden Pagoda ");
values.put(Media.MIME_TYPE, "image/jpeg");
// Insert the corresponding data Uri
Uri uri = getContentResolver().insert(
Media.EXTERNAL_CONTENT_URI, values);
// Load the jinta Picture
Bitmap bitmap = BitmapFactory.decodeResource(
MainActivity.this.getResources(), R.drawable.jinta);
OutputStream os = null;
try {
// Object for the data just inserted Uri Corresponding output stream
os = getContentResolver().openOutputStream(uri);
// Will bitmap Save the picture to Uri In the corresponding data node
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
os.close();
} catch (IOException io) {
io.printStackTrace();
}
}
});
}
@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;
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<Button
android:id="@+id/bt1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=" View pictures "/>
<Button
android:id="@+id/bt2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=" Add a picture "/>
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"></ListView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/txt1"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/txt2"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/image1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>