Android 4高级编程(第3版)_全套源码

package com.paad.contentproviders; import java.util.Calendar; import android.app.Activity; import android.content.ContentResolver; import android.content.ContentUris; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.provider.CalendarContract; import android.provider.ContactsContract; import android.provider.MediaStore; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class Ch08_ContentProvidersActivity extends Activity { TextView resultTextView; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); resultTextView = (TextView)findViewById(R.id.resultTextView); Button mediaStoreButton = (Button)findViewById(R.id.button1); mediaStoreButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { AsyncTask<Void, Void, StringBuilder> task = new AsyncTask<Void, Void, StringBuilder>() { @Override protected StringBuilder doInBackground(Void... params) { String[] result = getSongListing(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < result.length; i++) sb.append(result[i]); return sb; } @Override protected void onPostExecute(StringBuilder sb) { resultTextView.setText(sb.toString()); } }; task.execute(); } }); Button contactsButton = (Button)findViewById(R.id.button2); contactsButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { AsyncTask<Void, Void, StringBuilder> task = new AsyncTask<Void, Void, StringBuilder>() { @Override protected StringBuilder doInBackground(Void... params) { String[] result = getNames(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < result.length; i++) sb.append(result[i]); return sb; } @Override protected void onPostExecute(StringBuilder sb) { resultTextView.setText(sb.toString()); } }; task.execute(); } }); Button contactButton2 = (Button)findViewById(R.id.button3); contactButton2.setOnClickListener(new OnClickListener() { public void onClick(View v) { AsyncTask<Void, Void, StringBuilder> task = new AsyncTask<Void, Void, StringBuilder>() { @Override protected StringBuilder doInBackground(Void... params) { String[] result = getNameAndNumber(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < result.length; i++) sb.append(result[i]); return sb; } @Override protected void onPostExecute(StringBuilder sb) { resultTextView.setText(sb.toString()); } }; task.execute(); } }); Button reverseLookupButton = (Button)findViewById(R.id.button4); reverseLookupButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { AsyncTask<Void, Void, String> task = new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { return performCallerId(); } @Override protected void onPostExecute(String result) { resultTextView.setText(result); } }; task.execute(); } }); Button pickContactButton = (Button)findViewById(R.id.button5); pickContactButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { pickContact(); } }); Button insertContactButton = (Button)findViewById(R.id.button6); insertContactButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { insertContactWithIntent(); } }); Button queryEventsButton = (Button)findViewById(R.id.button7); queryEventsButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { AsyncTask<Void, Void, StringBuilder> task = new AsyncTask<Void, Void, StringBuilder>() { @Override protected StringBuilder doInBackground(Void... params) { String[] result = queryCalendar(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < result.length; i++) sb.append(result[i]); return sb; } @Override protected void onPostExecute(StringBuilder sb) { resultTextView.setText(sb.toString()); } }; task.execute(); } }); Button addEventButton = (Button)findViewById(R.id.button8); addEventButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { insertNewEventIntoCalendar(); } }); Button editEventButton = (Button)findViewById(R.id.button9); editEventButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { editCalendarEvent(); } }); Button viewTimeButton = (Button)findViewById(R.id.button10); viewTimeButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { displayCalendarEvent(); } }); } private String[] getSongListing() { /** * Listing 8-35: Accessing the Media Store Content Provider */ // Get a Cursor over every piece of audio on the external volume, // extracting the song title and album name. String[] projection = new String[] { MediaStore.Audio.AudioColumns.ALBUM, MediaStore.Audio.AudioColumns.TITLE }; Uri contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; Cursor cursor = getContentResolver().query(contentUri, projection, null, null, null); // Get the index of the columns we need. int albumIdx = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.ALBUM); int titleIdx = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.TITLE); // Create an array to store the result set. String[] result = new String[cursor.getCount()]; // Iterate over the Cursor, extracting each album name and song title. while (cursor.moveToNext()) { // Extract the song title. String title = cursor.getString(titleIdx); // Extract the album name. String album = cursor.getString(albumIdx); result[cursor.getPosition()] = title + " (" + album + ")"; } // Close the Cursor. cursor.close(); // return result; } private String[] getNames() { /** * Listing 8-36: Accessing the Contacts Contract Contact Content Provider */ // Create a projection that limits the result Cursor // to the required columns. String[] projection = { ContactsContract.Contacts._ID, ContactsContract.Contacts.DISPLAY_NAME }; // Get a Cursor over the Contacts Provider. Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, projection, null, null, null); // Get the index of the columns. int nameIdx = cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME); int idIdx = cursor.getColumnIndexOrThrow(ContactsContract.Contacts._ID); // Initialize the result set. String[] result = new String[cursor.getCount()]; // Iterate over the result Cursor. while(cursor.moveToNext()) { // Extra