调用系统相机拍照/获取系统相册

一篇好的博文   https://blog.csdn.net/q_probably/article/details/53539912 // private Button take_photo,select_photo;
public static final int TAKE_PHOTO = 1;
public static final int SELECT_PHOTO = 2;
private ImageView imageview;
private Uri imageUri;
private static final String TAG = "CreatWriteActivity";
private TextView photo_pop;
private TextView camera_pop;
private TextView cancle_pop;
private PopupWindow popupWindow;


@OnClick({R.id.writ_back, R.id.creat_start, R.id.writ_jia})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.writ_back:
//底部弹出框
// initDialog();

break;
case R.id.creat_start:
initStart();
break;
case R.id.writ_jia:
//调用系统相机 从相册获取图片
initPopCamera();
break;
}
}

//弹出框
private void initPopCamera() {
View contentView = LayoutInflater.from(CreatWriteActivity.this).inflate(R.layout.pop_camera, null);
popupWindow = new PopupWindow(contentView, 500, 300, true);
photo_pop = contentView.findViewById(R.id.photo_pop);
camera_pop = contentView.findViewById(R.id.camera_pop);
cancle_pop = contentView.findViewById(R.id.cancle_pop);
//找控件 设置点击事件
popupWindow.setContentView(contentView);
//显示PopupWindow
View rootview = LayoutInflater.from(this).inflate(R.layout.creat_write, null);
popupWindow.showAtLocation(rootview, Gravity.BOTTOM, 0, 0);
initClick();
}

private void initClick() {
photo_pop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//调用相册
initPhoto();
}
});
camera_pop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//调用相机
initCamera();
}
});
cancle_pop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//取消pop
popupWindow.dismiss();
}
});
}

/**
* 从相册中获取图片
*/
private void initPhoto() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {
openAlbum();
}
}

/**
* 打开相册的方法
*/
private void openAlbum() {
Intent intent = new Intent("android.intent.action.GET_CONTENT");
intent.setType("image/*");
startActivityForResult(intent, SELECT_PHOTO);
}

/**
* 拍照获取图片
**/
private void initCamera() {
//创建File对象，用于存储拍照后的图片
File outputImage = new File(getExternalCacheDir(), "output_image.jpg");
try {
if (outputImage.exists()) {
outputImage.delete();
}
outputImage.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
if (Build.VERSION.SDK_INT >= 24) {
imageUri = FileProvider.getUriForFile(this, "com.llk.study.activity.PhotoActivity", outputImage);
} else {
imageUri = Uri.fromFile(outputImage);
}
//启动相机程序
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, TAKE_PHOTO);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case TAKE_PHOTO:
if (resultCode == RESULT_OK) {
try {
Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
writJia.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
break;
case SELECT_PHOTO :
if (resultCode == RESULT_OK) {
//判断手机系统版本号
if (Build.VERSION.SDK_INT > 19) {
//4.4及以上系统使用这个方法处理图片
handleImgeOnKitKat(data);
}else {
handleImageBeforeKitKat(data);
}
}
break;
default:
break;
}
}

/**
*4.4以下系统处理图片的方法
* */
private void handleImageBeforeKitKat(Intent data) {
Uri uri = data.getData();
String imagePath = getImagePath(uri,null);
displayImage(imagePath);
}
/**
* 4.4及以上系统处理图片的方法
* */
@TargetApi(Build.VERSION_CODES.KITKAT)
private void handleImgeOnKitKat(Intent data) {
String imagePath = null;
Uri uri = data.getData();
if (DocumentsContract.isDocumentUri(this,uri)) {
//如果是document类型的uri，则通过document id处理
String docId = DocumentsContract.getDocumentId(uri);
if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
//解析出数字格式的id
String id = docId.split(":")[1];
String selection = MediaStore.Images.Media._ID + "=" + id;
imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,selection);
}else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"),Long.valueOf(docId));
imagePath = getImagePath(contentUri,null);
}else if ("content".equalsIgnoreCase(uri.getScheme())) {
//如果是content类型的uri，则使用普通方式处理
imagePath = getImagePath(uri,null);
}else if ("file".equalsIgnoreCase(uri.getScheme())) {
//如果是file类型的uri，直接获取图片路径即可
imagePath = uri.getPath();
}
//根据图片路径显示图片
displayImage(imagePath);
}
}
/**
* 根据图片路径显示图片的方法
* */
private void displayImage(String imagePath) {
if (imagePath != null) {
Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
imageview.setImageBitmap(bitmap);
}else {
Toast.makeText(this, "failed to get image", Toast.LENGTH_SHORT).show();
// ToastUtil.showShort(this,"failed to get image");
}
}

/**
* 通过uri和selection来获取真实的图片路径
* */
private String getImagePath(Uri uri,String selection) {
String path = null;
Cursor cursor = getContentResolver().query(uri,null,selection,null,null);
if (cursor != null) {
if (cursor.moveToFirst()) {
path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
}
cursor.close();
}
return path;
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case 1 :
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
openAlbum();
}else {
// ToastUtil.showShort(this,"you need the permission");
Toast.makeText(this, "you need the permission", Toast.LENGTH_SHORT).show();
}
break;
default:
break;
}
}
//发表
private void initStart() {
//intent传值
String content = writMsg.getText().toString().trim();
//presenter的调用
CreatPresenterImpl creatPresenter = new CreatPresenterImpl();
Log.d(TAG, "initStart
4000
: zzzzzzzzzzzzzzzzzzzzzzzz" + userToken);
creatPresenter.showCreatToView(userUid, userToken, content, new CreatModelImpl(), this);
}

//发布展示的方法
@Override
public void show(String msg) {
if (msg.equals("发布成功")) {
Toast.makeText(this, "发布成功", Toast.LENGTH_SHORT).show();
}
Toast.makeText(this, msg + "??", Toast.LENGTH_SHORT).show();
}