Android编程权威指南：第21章挑战练习：有一个隐式intent

先添加一个新的用于打电话的Button，布局添加好后给这个Button添加一个时间监听器。

mCallButton = (Button)v.findViewById(R.id.crime_callButton);
mCallButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Uri number = Uri.parse("tel:"+ mCrime.getPhoneNumber());
Intent i = new Intent(Intent.ACTION_DIAL, number);
startActivity(i);
}
});

由于要获得对应的电话号码，给Crime类添加号码信息。

private String mPhoneNumber;

public String getPhoneNumber() {
return mPhoneNumber;
}

public void setPhoneNumber(String phoneNumber) {
mPhoneNumber = phoneNumber;
}

package com.onevol.app;

import java.util.Date;
import java.util.UUID;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.database.Cursor;
import android.graphics.drawable.BitmapDrawable;
import android.hardware.Camera;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.NavUtils;
import android.text.Editable;
import android.text.TextWatcher;
import android.text.format.DateFormat;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;

public class CrimeFragment extends Fragment {
public static final String EXTRA_CRIME_ID = "crime_id";
//用于getSerializable()方法中UUID的键。
private static final String DIALOG_DATE = "date";//DatePickerFragment的tag常量，卵用
private static final int REQUEST_DATE = 0;
private static final int REQUEST_TIME = 1;
private static final int REQUEST_PHOTO = 2;
private static final int REQUEST_CONTACT = 3;
private static final String TAG = "CrimeFragment";
//用于DatePickerFragment设置目标fragment的setTargetFragment()方法
//CrimeFragment用其确定是哪一个fragment返回的数据。
protected static final String DIALOG_IMAGE = "image";

private Crime mCrime;
private EditText mTitleField;
private Button mDateButton;
private CheckBox mSolvedCheckBox;
private Button mTimeButton;
private ImageButton mPhotoButton;
private ImageView mPhotoView;
private Button mSuspectButton;
private Button mCallButton;

@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);//标题栏上添加的按钮
//      UUID crimeId = (UUID) getActivity().getIntent().getSerializableExtra(EXTRA_CRIME_ID);
UUID crimeId = (UUID)getArguments().getSerializable(EXTRA_CRIME_ID);
mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v = inflater.inflate(R.layout.fragment_crime, parent, false);

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB){
if(NavUtils.getParentActivityName(getActivity()) != null){
getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
}
}

mTitleField = (EditText)v.findViewById(R.id.crime_title);
mTitleField.setText(mCrime.getTitle());
mTitleField.addTextChangedListener(new TextWatcher(){
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
mCrime.setTitle(s.toString());
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
});

mDateButton = (Button) v.findViewById(R.id.crime_date);
//      SimpleD
eb48
ateFormat format=new SimpleDateFormat("dd-MM-yyyy");
//      String time=format.format(new Date());
mDateButton.setText(mCrime.getDate().toString());
//      mDateButton.setEnabled(false);
mDateButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
FragmentManager fm = getActivity().getSupportFragmentManager();
//              DatePickerFragment dialog = new DatePickerFragment();
DatePickerFragment dialog = DatePickerFragment.newInstance(mCrime.getDate());//新建DatePickerFragment并传递时间信息
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);//设置DatePickerFragment传递数据的目标。
dialog.show(fm, DIALOG_DATE);//显示该fragment(DialogFragment)。
}
});

mSolvedCheckBox = (CheckBox) v.findViewById(R.id.crime_solved);
mSolvedCheckBox.setChecked(mCrime.isSolved());
mSolvedCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener(){
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
mCrime.setSolved(isChecked);
}
});

mTimeButton = (Button)v.findViewById(R.id.crime_time);
mTimeButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
FragmentManager fm = getActivity().getSupportFragmentManager();
//              DatePickerFragment dialog = new DatePickerFragment();
TimePickerFragment tdialog = TimePickerFragment.newInstance(mCrime.getDate());//新建TimePickerFragment并传递时间信息
tdialog.setTargetFragment(CrimeFragment.this, REQUEST_TIME);//设置TimePickerFragment传递数据的目标。
tdialog.show(fm, DIALOG_DATE);////显示该fragment(DialogFragment)。忽略DIALOG_DATE不是DIALOG_TIME
}
});

mPhotoButton = (ImageButton)v.findViewById(R.id.crime_imageButton);
mPhotoButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(getActivity(), CrimeCameraActivity.class);
//              startActivity(i);
startActivityForResult(i, REQUEST_PHOTO);
}
});

mPhotoView = (ImageView)v.findViewById(R.id.crime_imageView);
registerForContextMenu(mPhotoView);
mPhotoView.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Photo p = mCrime.getPhoto();
if(p == null){
return;
}
FragmentManager fm = getActivity().getSupportFragmentManager();
String path = getActivity().getFileStreamPath(p.getFilename()).getAbsolutePath();
ImageFragment.newInstance(path, mCrime.getPhoto().getOrientation())
.show(fm, DIALOG_IMAGE);
}
});

Button reportButton = (Button)v.findViewById(R.id.crime_reportButton);
reportButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
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));
i = Intent.createChooser(i, getString(R.string.send_report));
startActivity(i);
}
});

mSuspectButton = (Button)v.findViewById(R.id.crime_suspectButton);
mSuspectButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(Intent.ACTION_PICK, ContactsContract.CommonDataKinds.Phone.CONTENT_URI);//修改联系人电话号码的URI
startActivityForResult(i, REQUEST_CONTACT);
}
});
if(mCrime.getSuspect() != null){
mSuspectButton.setText(mCrime.getSuspect());
}

mCallButton = (Button)v.findViewById(R.id.crime_callButton);
mCallButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Uri number = Uri.parse("tel:"+ mCrime.getPhoneNumber());
Intent i = new Intent(Intent.ACTION_DIAL, number);//拨好号码，等待用户发起通话
startActivity(i);
}
});

PackageManager pm = getActivity().getPackageManager();//判断设备是否有相机
boolean hasACamera = pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)||
pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)||
Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD||
Camera.getNumberOfCameras() > 0;
if(!hasACamera){
mPhotoButton.setEnabled(false);//没有将不能按相机按钮
}
return v;
}

public static CrimeFragment newInstance(UUID crimeId){//托管activity需要fragment实例是，调用newInstance方法
Bundle args = new Bundle();
args.putSerializable(EXTRA_CRIME_ID, crimeId);
//取出crimeId的值，添加到bundle中
CrimeFragment fragment = new CrimeFragment();
fragment.setArguments(args);//设给fragment
return fragment;
}

public void returnResult(){
getActivity().setResult(Activity.RESULT_OK, null);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {//CrimeFragment与其它fragment的数据传递。
//该方法是接受其它fragment传来的时间数据，改变按钮上显示的时间。
// TODO Auto-generated method stub
if(resultCode != Activity.RESULT_OK) return;
if(requestCode == REQUEST_DATE){//如果是DatePickerFragment传的数据
Date date = (Date)data.getSerializableExtra(DatePickerFragment.EXTRA_DATE);
mCrime.setDate(date);
mDateButton.setText(mCrime.getDate().toString());
}
if(requestCode == REQUEST_TIME){//如果是TimePickerFragment传的数据
Date date = (Date)data.getSerializableExtra(TimePickerFragment.EXTRA_TIME);
mCrime.setDate(date);
mDateButton.setText(mCrime.getDate().toString());
}
if(requestCode == REQUEST_PHOTO){
if(mCrime.getPhoto() != null) {
mCrime.deletePhoto(getActivity().getFileStreamPath(mCrime.getPhoto().getFilename()).getAbsolutePath());
}
String filename = data.getStringExtra(CrimeCameraFragment.EXTRA_PHOTO_FILENAME);
int orientation = data.getIntExtra(CrimeCameraFragment.EXTRA_PHOTO_ORIENTATION, 0);
if(filename != null){
//              Log.i(TAG, "filename: " + filename);
Photo p = new Photo(filename, orientation);
mCrime.setPhoto(p);
//              Log.i(TAG, "Crime: " + mCrime.getTitle() + " has a photo");
showPhoto();
}
}
if(requestCode == REQUEST_CONTACT){
Uri contactUri = data.getData();

String[] queryFields = new String[]{ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER};//获得联系人姓名及电话号码

Cursor c = getActivity().getContentResolver().query(contactUri, queryFields, null, null, null);
if(c.getCount() == 0){
c.close();
return;
}
c.moveToFirst();
String suspect = c.getString(0);
String number = c.getString(1);
mCrime.setSuspect(suspect);
mCrime.setPhoneNumber(number);
mSuspectButton.setText(suspect);
mCallButton.setText("CALL:" + suspect);
c.close();
}
}

@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
CrimeLab.get(getActivity()).saveCrimes();
}

@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
showPhoto();
}

@Override
public void onStop() {
// TODO Auto-generated method stub
super.onStop();
PictureUtils.cleanImageView(mPhotoView);
}

private void showPhoto(){
Photo p = mCrime.getPhoto();
BitmapDrawable b = null;
if(p != null){
String path = getActivity().getFileStreamPath(p.getFilename()).getAbsolutePath();
b = PictureUtils.getScaledDrawable(getActivity(), path);

if(p.getOrientation() == Configuration.ORIENTATION_PORTRAIT){//如果是竖屏就旋转90度
b = PictureUtils.getPortraitDrawable(mPhotoView, b);
}
}
mPhotoView.setImageDrawable(b);
}

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;
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// TODO Auto-generated method stub
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.delete_crime, menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch(item.getItemId()){
case R.id.menu_delete_crime://标题栏删除按钮
Crime crime = mCrime;
CrimeLab.get(getActivity()).deleteCrime(crime);
Intent i = new Intent(getActivity(), CrimeListActivity.class);
startActivity(i);
return true;
case android.R.id.home://标题栏后退按钮
if(NavUtils.getParentActivityName(getActivity()) != null){
NavUtils.navigateUpFromSameTask(getActivity());
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}

@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {
//添加上下文菜单
getActivity().getMenuInflater().inflate(R.menu.crime_list_item_context,menu);
}

@Override
public boolean onContextItemSelected(MenuItem item) {
if(mCrime.getPhoto() != null &&
mCrime.deletePhoto(getActivity().getFileStreamPath(mCrime.getPhoto().getFilename()).getAbsolutePath())) {
showPhoto();
return true;
}
return super.onContextItemSelected(item);
}
}

补充

android系统管理联系人的URI如下：

ContactsContract.Contacts.CONTENT_URI 管理联系人的Uri

ContactsContract.CommonDataKinds.Phone.CONTENT_URI 管理联系人的电话的Uri

ContactsContract.CommonDataKinds.Email.CONTENT_URI 管理联系人的Email的Uri

注：Contacts有两个表，分别是rawContact和Data，rawContact记录了用户的id和name,

其中id栏名称为：ContactsContract.Contacts._ID,

name名称栏为ContactContract.Contracts.DISPLAY_NAME,

电话信息表的外键id为ContactsContract.CommonDataKinds.Phone.CONTACT_ID,

电话号码栏名称为：ContactsContract.CommonDataKinds.Phone.NUMBER.

Email外键id为：ContactsContract.CommonDataKinds.Email.CONTACT_ID

Email地址栏名称为：ContactsContract.CommonDataKinds.Email.DATA