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Android初学第72天

androidIT知识Android初学

关山初度尘未洗，策马扬鞭再奋蹄！这篇文章主要讲述Android初学第72天相关的知识，希望能为你提供帮助。
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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