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android初学第72天【Android初学第72天】16_CameraIntent
代码
Criminalintent
CrimeFragment.java
package com.bignerdranch.android.criminalintent;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.content.FileProvider;
import android.text.Editable;
import android.text.TextWatcher;
import android.text.format.DateFormat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import java.io.File;
import java.util.Date;
import java.util.List;
import java.util.UUID;
import static android.widget.CompoundButton.*;
public class CrimeFragment extends Fragment {private static final String ARG_CRIME_ID = "crime_id";
private static final String DIALOG_DATE = "DialogDate";
private static final int REQUEST_DATE = 0;
private static final int REQUEST_CONTACT = 1;
private static final int REQUEST_PHOTO = 2;
private Crime mCrime;
private File mPhotoFile;
private EditText mTitleField;
private Button mDateButton;
private CheckBox mSolvedCheckbox;
private Button mReportButton;
private Button mSuspectButton;
private ImageButton mPhotoButton;
private ImageView mPhotoView;
public static CrimeFragment newInstance(UUID crimeId) {
Bundle args = new Bundle();
args.putSerializable(ARG_CRIME_ID, crimeId);
CrimeFragment fragment = new CrimeFragment();
fragment.setArguments(args);
return fragment;
}@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
UUID crimeId = (UUID) getArguments().getSerializable(ARG_CRIME_ID);
mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
mPhotoFile = CrimeLab.get(getActivity()).getPhotoFile(mCrime);
}@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_crime, container, false);
mTitleField = (EditText) v.findViewById(R.id.crime_title);
mTitleField.setText(mCrime.getTitle());
mTitleField.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
mCrime.setTitle(s.toString());
}@Override
public void afterTextChanged(Editable s) {}
});
mDateButton = (Button) v.findViewById(R.id.crime_date);
updateDate();
mDateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager manager = getFragmentManager();
DatePickerFragment dialog = DatePickerFragment
.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
dialog.show(manager, DIALOG_DATE);
}
});
mSolvedCheckbox = (CheckBox) v.findViewById(R.id.crime_solved);
mSolvedCheckbox.setChecked(mCrime.isSolved());
mSolvedCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mCrime.setSolved(isChecked);
}
});
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));
i = Intent.createChooser(i, getString(R.string.send_report));
startActivity(i);
}
});
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());
}PackageManager packageManager = getActivity().getPackageManager();
if (packageManager.resolveActivity(pickContact,
PackageManager.MATCH_DEFAULT_ONLY) == null) {
mSuspectButton.setEnabled(false);
}mPhotoButton = (ImageButton) v.findViewById(R.id.crime_camera);
final Intent captureImage = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
boolean canTakePhoto = mPhotoFile != null &
&
captureImage.resolveActivity(packageManager) != null;
mPhotoButton.setEnabled(canTakePhoto);
mPhotoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Uri uri = FileProvider.getUriForFile(getActivity(),
"com.bignerdranch.android.criminalintent.fileprovider",
mPhotoFile);
captureImage.putExtra(MediaStore.EXTRA_OUTPUT, uri);
List<
ResolveInfo>
cameraActivities = getActivity()
.getPackageManager().queryIntentActivities(captureImage,
PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo activity : cameraActivities) {
getActivity().grantUriPermission(activity.activityInfo.packageName,
uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}startActivityForResult(captureImage, REQUEST_PHOTO);
}
});
mPhotoView = (ImageView) v.findViewById(R.id.crime_photo);
updatePhotoView();
return v;
}@Override
public void onPause() {
super.onPause();
CrimeLab.get(getActivity())
.updateCrime(mCrime);
}@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != Activity.RESULT_OK) {
return;
}if (requestCode == REQUEST_DATE) {
Date date = (Date) data
.getSerializableExtra(DatePickerFragment.EXTRA_DATE);
mCrime.setDate(date);
updateDate();
} 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 here
Cursor c = getActivity().getContentResolver()
.query(contactUri, queryFields, null, null, null);
try {
// Double-check that you actually got results
if (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();
}
} else if (requestCode == REQUEST_PHOTO) {
Uri uri = FileProvider.getUriForFile(getActivity(),
"com.bignerdranch.android.criminalintent.fileprovider",
mPhotoFile);
getActivity().revokeUriPermission(uri,
Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
updatePhotoView();
}
}private void updateDate() {
mDateButton.setText(mCrime.getDate().toString());
}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;
}private void updatePhotoView() {
if (mPhotoFile == null || !mPhotoFile.exists()) {
mPhotoView.setImageDrawable(null);
} else {
Bitmap bitmap = PictureUtils.getScaledBitmap(
mPhotoFile.getPath(), getActivity());
mPhotoView.setImageBitmap(bitmap);
}
}
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