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<?xml version="1.0" encoding="utf-8"?>

  

<?xml version="1.0" encoding="utf-8"?>


  

  
  

public class MainActivity extends Activity{
 private static int REQUEST_CAMERA =1;
 private static int IMAGE_REQUEST_CODE =2;
 private File file;
 private Button button,take_button;
 private ImageView imageView;
 private String paths;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_test);

  button = (Button)findViewById(R.id.button);
  take_button = (Button)findViewById(R.id.take_button);
  imageView = (ImageView)findViewById(R.id.ivView);

  button.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    applyWritePermission();

   }
  });

  take_button.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    getPhoto();
   }
  });

 }

 private void useCamera() {
  Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
    + "/test/" + System.currentTimeMillis() + ".jpg");
  file.getParentFile().mkdirs();
  //改變Uri com.xykj.customview.fileprovider注意和xml中的一致
  Uri uri = FileProvider.getUriForFile(this, "com.gjp.activity.teste.fileprovider", file);
  //添加權(quán)限
  intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
  intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
  startActivityForResult(intent, REQUEST_CAMERA);
 }

 private void getPhoto(){
  //在這里跳轉(zhuǎn)到手機(jī)系統(tǒng)相冊里面
  Intent intent = new Intent(
    Intent.ACTION_PICK,
    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
  startActivityForResult(intent, IMAGE_REQUEST_CODE);
 }

 public void applyWritePermission() {
  String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
  if (Build.VERSION.SDK_INT >= 23) {
   int check = ContextCompat.checkSelfPermission(this, permissions[0]);
   // 權(quán)限是否已經(jīng) 授權(quán) GRANTED---授權(quán) DINIED---拒絕
   if (check == PackageManager.PERMISSION_GRANTED) {
     useCamera();
   } else {
    requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
   }
  } else {
    useCamera();
  }
 }

 @Override
 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
           @NonNull int[] grantResults) {
  super.onRequestPermissionsResult(requestCode, permissions, grantResults);
  if (requestCode == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
   useCamera();
  } else {
   // 沒有獲取 到權(quán)限，從新請求，或者關(guān)閉app
   Toast.makeText(this, "需要存儲權(quán)限", Toast.LENGTH_SHORT).show();
  }
 }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  if (requestCode == REQUEST_CAMERA && resultCode == RESULT_OK) {
   Log.e("TAG", "---------" + FileProvider.getUriForFile(this, "com.gjp.activity.teste.fileprovider", file));
   imageView.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
   //在手機(jī)相冊中顯示剛拍攝的圖片
   Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
   Uri contentUri = Uri.fromFile(file);
   mediaScanIntent.setData(contentUri);
   sendBroadcast(mediaScanIntent);
  }
  if (requestCode == IMAGE_REQUEST_CODE && resultCode == RESULT_OK) {
   try {
    Uri selectedImage = data.getData(); //獲取系統(tǒng)返回的照片的Uri
    String[] filePathColumn = {MediaStore.Images.Media.DATA};
    Cursor cursor = getContentResolver().query(selectedImage,
      filePathColumn, null, null, null);//從系統(tǒng)表中查詢指定Uri對應(yīng)的照片
    cursor.moveToFirst();
    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    paths = cursor.getString(columnIndex); //獲取照片路徑
    cursor.close();
    Bitmap bitmap = BitmapFactory.decodeFile(paths);
    imageView.setImageBitmap(bitmap);
   } catch (Exception e) {
    e.printStackTrace();
   }
 }
 }
}