Android实现拍照及图片裁剪（6.0以上权限处理及7.0以上文件管理）

2023-09-22 22:02:06 54

最近做项目中涉及到了图片相关功能，在使用安卓6.0手机及7.1手机拍照时，遇到了因权限及文件管理导致程序崩溃等问题。
刚好把功能修改完，把代码简单地贴一下，方便以后使用。

—-主界面代码——

publicclassMainActivityextendsAppCompatActivity{
//拍照按钮
privateButtontake_photo;
//显示裁剪后的图片
privateImageViewphoto_iv;
privatestaticfinalintPERMISSIONS_FOR_TAKE_PHOTO=10;
//图片文件路径
privateStringpicPath;
//图片对应Uri
privateUriphotoUri;
//拍照对应RequestCode
publicstaticfinalintSELECT_PIC_BY_TACK_PHOTO=1;
//裁剪图片
privatestaticfinalintCROP_PICTURE=3;


@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
take_photo=(Button)findViewById(R.id.take_photo);
photo_iv=(ImageView)findViewById(R.id.photo_iv);
take_photo.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
//小于6.0版本直接操作
if(Build.VERSION.SDK_INT<23){
takePictures();
}else{
//6.0以后权限处理
permissionForM();
}
}
});
}

@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
super.onActivityResult(requestCode,resultCode,data);
if(resultCode==Activity.RESULT_OK){
if(requestCode==SELECT_PIC_BY_TACK_PHOTO){
String[]pojo={MediaStore.Images.Media.DATA};
Cursorcursor=managedQuery(photoUri,pojo,null,null,null);
if(cursor!=null){
intcolumnIndex=cursor.getColumnIndexOrThrow(pojo[0]);
cursor.moveToFirst();
picPath=cursor.getString(columnIndex);
if(Build.VERSION.SDK_INT<14){
cursor.close();
}
}
if(picPath!=null&&(picPath.endsWith(".png")||picPath.endsWith(".PNG")||picPath.endsWith(".jpg")||picPath.endsWith(".JPG"))){
photoUri=Uri.fromFile(newFile(picPath));
if(Build.VERSION.SDK_INT>23){
photoUri=FileProvider.getUriForFile(this,"com.innopro.bamboo.fileprovider",newFile(picPath));
cropForN(picPath,CROP_PICTURE);
}else{
startPhotoZoom(photoUri,CROP_PICTURE);
}
}else{
//错误提示
}
}
if(requestCode==CROP_PICTURE){
if(photoUri!=null){
Bitmapbitmap=BitmapFactory.decodeFile(picPath);
if(bitmap!=null){
photo_iv.setImageBitmap(bitmap);
}
}
}
}
}

/**
*拍照获取图片
*/
privatevoidtakePictures(){
//执行拍照前，应该先判断SD卡是否存在
StringSDState=Environment.getExternalStorageState();
if(SDState.equals(Environment.MEDIA_MOUNTED)){
Intentintent=newIntent(MediaStore.ACTION_IMAGE_CAPTURE);
ContentValuesvalues=newContentValues();
photoUri=getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);
intent.putExtra(MediaStore.EXTRA_OUTPUT,photoUri);
startActivityForResult(intent,SELECT_PIC_BY_TACK_PHOTO);
}else{
Toast.makeText(this,"手机未插入内存卡",Toast.LENGTH_LONG).show();
}
}


/**
*图片裁剪，参数根据自己需要设置
*
*@paramuri
*@paramREQUE_CODE_CROP
*/
privatevoidstartPhotoZoom(Uriuri,
intREQUE_CODE_CROP){
intdp=500;
Intentintent=newIntent("com.android.camera.action.CROP");
intent.setDataAndType(uri,"image/*");
//下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪
intent.putExtra("crop","true");
intent.putExtra("scale",true);//去黑边
intent.putExtra("scaleUpIfNeeded",true);//去黑边
//aspectXaspectY是宽高的比例
intent.putExtra("aspectX",4);//输出是X方向的比例
intent.putExtra("aspectY",3);
intent.putExtra("outputX",600);//输出X方向的像素
intent.putExtra("outputY",450);
intent.putExtra("outputFormat",Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection",true);
intent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
intent.putExtra("return-data",false);//设置为不返回数据
startActivityForResult(intent,REQUE_CODE_CROP);
}

/**
*7.0以上版本图片裁剪操作
*
*@paramimagePath
*@paramREQUE_CODE_CROP
*/
privatevoidcropForN(StringimagePath,intREQUE_CODE_CROP){
UricropUri=getImageContentUri(newFile(imagePath));
Intentintent=newIntent("com.android.camera.action.CROP");
intent.setDataAndType(cropUri,"image/*");
intent.putExtra("crop","true");
//输出是X方向的比例
intent.putExtra("aspectX",4);
intent.putExtra("aspectY",3);
//outputXoutputY是裁剪图片宽高
intent.putExtra("outputX",600);
intent.putExtra("outputY",450);
intent.putExtra("scale",true);
intent.putExtra("return-data",false);
intent.putExtra(MediaStore.EXTRA_OUTPUT,cropUri);
intent.putExtra("outputFormat",Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection",true);
startActivityForResult(intent,REQUE_CODE_CROP);
}

privateUrigetImageContentUri(FileimageFile){
StringfilePath=imageFile.getAbsolutePath();
Cursorcursor=getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
newString[]{MediaStore.Images.Media._ID},
MediaStore.Images.Media.DATA+"=?",
newString[]{filePath},null);

if(cursor!=null&&cursor.moveToFirst()){
intid=cursor.getInt(cursor
.getColumnIndex(MediaStore.MediaColumns._ID));
UribaseUri=Uri.parse("content://media/external/images/media");
returnUri.withAppendedPath(baseUri,""+id);
}else{
if(imageFile.exists()){
ContentValuesvalues=newContentValues();
values.put(MediaStore.Images.Media.DATA,filePath);
returngetContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);
}else{
returnnull;
}
}
}

/**
*安卓6.0以上版本权限处理
*/
privatevoidpermissionForM(){
if(ContextCompat.checkSelfPermission(this,
Manifest.permission.CAMERA)!=PackageManager.PERMISSION_GRANTED||ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED||ContextCompat.checkSelfPermission(this,
Manifest.permission.READ_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED){

ActivityCompat.requestPermissions(this,
newString[]{Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE},
PERMISSIONS_FOR_TAKE_PHOTO);
}else{
takePictures();
}
}

@Override
publicvoidonRequestPermissionsResult(intrequestCode,
@NonNullString[]permissions,@NonNullint[]grantResults){

if(requestCode==PERMISSIONS_FOR_TAKE_PHOTO){
if(grantResults[0]==PackageManager.PERMISSION_GRANTED){
takePictures();
}
return;
}
super.onRequestPermissionsResult(requestCode,permissions,grantResults);
}

}

–主界面布局——–

–AndroidManifest.xml添加provider——–

–资源文件下添加xml文件夹及file_paths文件——–

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

Android实现拍照及图片裁剪（6.0以上权限处理及7.0以上文件管理）

热门推荐

随机推荐