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);//      SimpleDateFormat 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