我是android领域的新手，我尝试在设置像Whatsapp这样的个人资料照片时裁剪图像。我开发了程序但无法得到答案。如果我尝试打开我的相机按钮，它将打开并仅捕获图片它赢了`t 移动到裁剪会话。它发生在我尝试打开画廊时。在这里，我附上了我的编码：
package com.example.ds.newcrop;
import android.Manifest;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.StrictMode;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.File;
import static android.os.Build.VERSION_CODES.M;
public class MainActivity extends AppCompatActivity {
ImageView imageView;
Toolbar toolbar;
File file;
Uri uri;
Intent CamIntent,GalIntent,CropIntent;
final int RequestPermissionCode=1;
DisplayMetrics displayMetrics;
int width,height;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Crop Image");
setSupportActionBar(toolbar);
imageView = (ImageView) findViewById(R.id.imageView);
int permissioncheck = ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA);
if(permissioncheck == PackageManager.PERMISSION_DENIED)
RequestRuntimePermission();
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder(); StrictMode.setVmPolicy(builder.build());
}
// StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder(); StrictMode.setVmPolicy(builder.build());
private void RequestRuntimePermission() {
if(ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,Manifest.permission.CAMERA))
Toast.makeText(this,"Camera Permission allows us to access CAMERA App",Toast.LENGTH_SHORT).show();
else {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, RequestPermissionCode);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main,menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.btn_camera) {
CameraOpen();
}
else if (item.getItemId() == R.id.btn_gallery){
GalleryOpen();
}
return true;
}
private void GalleryOpen() {
GalIntent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(Intent.createChooser(GalIntent,"Select Image from Gallery"),2);
}
private void CameraOpen() {
CamIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
file = new File(Environment.getExternalStorageDirectory(),
"tmp_"+String.valueOf(System.currentTimeMillis())+".jpg");
/*Log.e("filecheck",Environment.getExternalStorageDirectory()+
"file"+String.valueOf(System.currentTimeMillis())+"jpg");
if(file == null)
Log.e("filecheck","filenull");*/
Uri uri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider",file);
// uri = Uri.fromFile(file);
CamIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,uri);
CamIntent.putExtra("return-data",true);
startActivityForResult(CamIntent,0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//Log.e("filecheck","filerc"+requestCode+"/"+resultCode);
if(requestCode == 0 && resultCode == RESULT_OK )
CropImage();
else if(requestCode == 2 && resultCode == RESULT_OK) {
if(data!=null)
{
uri = data.getData();
CropImage();
}
}
else if (requestCode == 1 && resultCode == RESULT_OK)
{
if(data!=null)
{
Bundle bundle = data.getExtras();
Bitmap bitmap = bundle.getParcelable("data");
imageView.setImageBitmap(bitmap);
}
}
}
private void CropImage() {
final int width = 400;
final int height = 200;
try {
CropIntent = new Intent("com.android.camera.action.CROP");
Uri contentUri;
if(Build.VERSION.SDK_INT > M){
if(file == null)
Log.e("filecheck","filenull");
Log.e("filecheck",file.getAbsolutePath());
contentUri = FileProvider.getUriForFile(MainActivity.this,
"com.example.ds.newcrop.provider",
file);//package.provider
//TODO: Permission..
getApplicationContext().grantUriPermission("com.android.camera",
contentUri,
Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
CropIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
CropIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}else{
contentUri = Uri.fromFile(file);
}
CropIntent.setDataAndType(uri,"image/*");
CropIntent.putExtra("crop","true");
CropIntent.putExtra("outputX",180);
CropIntent.putExtra("outputY",180);
CropIntent.putExtra("aspectX",3);
CropIntent.putExtra("aspectY",4);
CropIntent.putExtra("ScaleUpIfNeeded",true);
CropIntent.putExtra("return-data",true);
CropIntent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
startActivityForResult(CropIntent,1);
}
catch(ActivityNotFoundException ex)
{
Log.e("Activity Not Found",""+ex.toString());
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch(requestCode)
{
case RequestPermissionCode:
{
if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
else
Toast.makeText(this,"Permission Denied",Toast.LENGTH_SHORT).show();
}
}
}
}
我还附加了所有清单和路径提供程序。但它不起作用。请任何人给我一个解决方案。提前致谢。