15.1

1.添加按鈕用字符串（Strings.xml)

<string name="crime_report_subject">CriminalIntent Crime Report</string><string name="send_report">Send crime report via</string>

15.2

1.添加Suspect成員變量（Crime.java)

private String mSuspect; public String getSuspect() {return mSuspect;}public void setSuspect(String suspect) {mSuspect = suspect;}

2.添加嫌疑人數據庫字段（CrimeDBSchema.java)

public static final String SUSPECT = "suspect";

3.添加嫌疑人數據庫字段（CrimeBaseHelper.java)

CrimeTable.Cols.SUSPECT +

4.寫入嫌疑人信息（CrimeLab.java)

values.put(CrimeTable.Cols.SUSPECT, crime.getSuspect());

5.讀取嫌疑人信息（CrimeCursorWrapper.java)

String suspect = getString(getColumnIndex(CrimeTable.Cols.SUSPECT)); crime.setSuspect(suspect);

15.3

1.添加字符串資源（strings.xml）

<string name="crime_report">%1$s!The crime was discovered on %2$s. %3$s, and %4$s</string><string name="crime_report_solved">The case is solved</string><string name="crime_report_unsolved">The case is not solved</string><string name="crime_report_no_suspect">there is no suspect.</string><string name="crime_report_suspect">the suspect is %s.</string><string name="crime_report_subject">CriminalIntent Crime Report</string><string name="send_report">Send crime report via</string>

2.新增getCrimeReport（）方法（CrimeFragment.java)

private String getCrimeReport() {String solvedString = null;if (mCrime.isSolved()) {solvedString = getString(R.string.crime_report_solved);} else {solvedString = getString(R.string.crime_report_unsolved);}String dateFormat = "EEE, MMM dd";String dateString = DateFormat.format(dateFormat, mCrime.getDate()).toString();String suspect = mCrime.getSuspect();if (suspect == null) {suspect = getString(R.string.crime_report_no_suspect);} else {suspect = getString(R.string.crime_report_suspect, suspect);}String report = getString(R.string.crime_report,mCrime.getTitle(), dateString, solvedString, suspect);return report;}

15.4.2

1.發送消息（CrimeFragment.java)

private Button mReportButton;

mReportButton = (Button) v.findViewById(R.id.crime_report);mReportButton.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {Intent i = new Intent(Intent.ACTION_SEND);i.setType("text/plain");i.putExtra(Intent.EXTRA_TEXT, getCrimeReport());i.putExtra(Intent.EXTRA_SUBJECT,getString(R.string.crime_report_subject));startActivity(i);}});

2.使用選擇器（CrimeFragment.java)

i = Intent.createChooser(i, getString(R.string.send_report));

15.4.3

1.添加嫌疑人按鈕成員變量（CrimeFragment.java)

private static final int REQUEST_CONTACT = 1; private Button mSuspectButton;

2.發送隱式intent（CrimeFragment.java)

final Intent pickContact = new Intent(Intent.ACTION_PICK,ContactsContract.Contacts.CONTENT_URI);mSuspectButton = (Button) v.findViewById(R.id.crime_suspect);mSuspectButton.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {startActivityForResult(pickContact, REQUEST_CONTACT);}});if (mCrime.getSuspect() != null) {mSuspectButton.setText(mCrime.getSuspect());}

3.獲取聯系人名單（CrimeFragment.java)

} else if (requestCode == REQUEST_CONTACT && data != null) {Uri contactUri = data.getData();// Specify which fields you want your query to return// values for.String[] queryFields = new String[]{ContactsContract.Contacts.DISPLAY_NAME};// Perform your query - the contactUri is like a "where"// clause hereCursor c = getActivity().getContentResolver().query(contactUri, queryFields, null, null, null);try {// Double-check that you actually got resultsif (c.getCount() == 0) {return;}// Pull out the first column of the first row of data -// that is your suspect's name.c.moveToFirst();String suspect = c.getString(0);mCrime.setSuspect(suspect);mSuspectButton.setText(suspect);} finally {c.close();}}

15.4.4

1.檢查是否存在聯系人應用（CrimeFragment.java)

PackageManager packageManager = getActivity().getPackageManager();if (packageManager.resolveActivity(pickContact,PackageManager.MATCH_DEFAULT_ONLY) == null) {mSuspectButton.setEnabled(false);}

2.過濾器驗證代碼（CrimeFragment.java)

pickContact.addCategory(Intent.CATEGORY_HOME);

3.刪除驗證代碼（CrimeFragment.java)
刪除

pickContact.addCategory(Intent.CATEGORY_HOME);

總結

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