Warning: file_get_contents(/data/phpspider/zhask/data//catemap/3/android/201.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
Android 让用户裁剪图像_Android_Android Intent_Crop - Fatal编程技术网

Android 让用户裁剪图像

Android 让用户裁剪图像,android,android-intent,crop,Android,Android Intent,Crop,我很难想出如何让用户裁剪图片。 我想给位图变量加载位图裁剪图片之前设置为壁纸。但我没能做到。。。这是我试过的 第一版正常工作,但返回的图像分辨率较差。将输出更改为更高的值没有帮助。正如我在一些帖子中看到的,不建议使用摄像头,因为并非所有设备都支持这一点 Intent intent = new Intent("com.android.camera.action.CROP"); String path = Images.Media.insertImage(context.getContentRe

我很难想出如何让用户裁剪图片。 我想给位图变量加载位图裁剪图片之前设置为壁纸。但我没能做到。。。这是我试过的

第一版正常工作,但返回的图像分辨率较差。将输出更改为更高的值没有帮助。正如我在一些帖子中看到的,不建议使用摄像头,因为并非所有设备都支持这一点

Intent intent = new Intent("com.android.camera.action.CROP");  
String path = Images.Media.insertImage(context.getContentResolver(), loaded,null, null);
Uri uri = Uri.parse(path);              
intent.setData(uri);  
intent.putExtra("crop", "true");  
intent.putExtra("aspectX", 1);  
intent.putExtra("aspectY", 1);  
intent.putExtra("outputX", 300);  
intent.putExtra("outputY", 300);  
intent.putExtra("noFaceDetection", true);  
intent.putExtra("return-data", true);                                  
startActivityForResult(intent, 2);
第二。加载图像选择器,然后进行裁剪。我如何配置它以直接在图像上加载裁剪?就像第1版一样

Intent photoPickerIntent = new Intent(MediaStore.ACTION_PICK);
photoPickerIntent.setData(uri);
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, 2);
和非活动结果

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode != RESULT_OK) { return; }
    if(requestCode == 2) {
        Bundle extras = data.getExtras();  
        if(extras != null ) {  
            Bitmap photo = extras.getParcelable("data");  
            loaded = photo;
        }
        WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());

        try {
            myWallpaperManager.setBitmap(loaded);
        } catch (IOException e) {}
    }
}
我不知道这些方法是否正确,但我希望有人能给我指出正确的方向。其中,为什么,以及如何使用


更新:我仍在等待有人指出如何正确操作,下面的答案有效,但返回的图像分辨率较差,因此它们不是使用的选项

我在使用相机和
操作时也遇到了问题,返回的图像非常小,尽管通过的分辨率要大得多。我绕过了这个问题,将生成的裁剪图像存储在一个临时文件中

// temporary storage location, preferably in your cache directory
private final String tempFilePath = "somePath";

// URI instantiated with your temporary storage location
private Uri tempuri = Uri.fromFile(new File(tempFilePath));

// code for startActivityForResult
private final static int ACTIVITY_CROP_IMAGE = 1;
像这样称呼意图

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra("aspectX", wallpaperWidth);
photoPickerIntent.putExtra("aspectY", wallpaperHeight);
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempuri);
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, ACTIVITY_CROP_IMAGE);
然后在
onActivityResult

protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{
    if (resultCode != RESULT_OK) 
        return;

    if(requestCode == ACTIVITY_CROP_IMAGE) 
    {
        try 
        {
            Bitmap bmp = BitmapFactory.decodeFile(tempFilePath);
            if(bmp != null)
            {
                WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
                myWallpaperManager.setBitmap(bmp);
            }
        } 
        catch (IOException e) 
        {
            e.printStackTrace();
        }
        finally
        {
            if(tempFilePath != null)
            {
                File tempFile = new File(tempFilePath);
                if(tempFile.exists())
                {
                    tempFile.delete();
                }
            }
        }
    }
}
我从头开始构建了上面的代码,实际上并没有编译任何代码。但是基础是正确的,你应该掌握窍门;-)

首先,变量:

final int PIC_CROP = 2;

Uri imageUri;
Bitmap thePic;
在从相机或多媒体资料中拍摄照片之前,请将图像放入Uri(imageUri),在try/catch中使用一种称为“performCrop()”的方法:

 private void performCrop(){
        try {
            Intent intent = new Intent("com.android.camera.action.CROP"); 
            intent.setType("image/*");

            List<ResolveInfo> list = getPackageManager().queryIntentActivities( intent, 0 );
            int size = list.size();

            if (size >= 0) {
                intent.setData(imageUri);        
                intent.putExtra("crop", "false");
                intent.putExtra("aspectX", 1);
                intent.putExtra("aspectY", 1);
                intent.putExtra("outputX", 256);
                intent.putExtra("outputY", 256);
                intent.putExtra("scale", true);  
                intent.putExtra("return-data", true);

                Intent i = new Intent(intent);
                ResolveInfo res = list.get(0);
                i.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));

                startActivityForResult(i, PIC_CROP);  
            } 

        }
        catch(ActivityNotFoundException anfe){
            String errorMessage = "Whoops - your device doesn't support the crop action!";
            Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
            toast.show();
        }
    }

好的,亲爱的,我把我的作物图像的全部代码放在Android上了。 这是全局变量

    //This For Image Crop
        /**
         *  Uri for set image crop option .
         */
        private Uri mImageCaptureUri;
        /**
         *  int for set key and get key from result activity . 
         */
        public final int CROP_FROM_CAMERA = 0;

/**
     * Bitmap for apply Crop Operation Result.
     */
    private Bitmap _tempOpration;

    //This is Crop Method.

/**
     * Method for apply Crop .
     * @param filePath -  String path of file .
     */
    private void doCrop(String filePath){
        try{
            //New Flow
            mImageCaptureUri = Uri.fromFile(new File(filePath));

            final ArrayList<CropOption> cropOptions = new ArrayList<CropOption>();
            Intent intent = new Intent("com.android.camera.action.CROP");
            intent.setType("image/*");
            List<ResolveInfo> list = getPackageManager().queryIntentActivities( intent, 0 );

            int size = list.size();
            if (size == 0) 
            {           
                Toast.makeText(this, "Can not find image crop app", Toast.LENGTH_SHORT).show();
                return;
            }
            else 
            {
                intent.setData(mImageCaptureUri);
                intent.putExtra("outputX", 300);
                intent.putExtra("outputY", 300);
                intent.putExtra("aspectX", 1);
                intent.putExtra("aspectY", 1);
                intent.putExtra("scale", true);
                intent.putExtra("return-data", true);

                if (size == 1) 
                {
                    Intent i = new Intent(intent);
                    ResolveInfo res = list.get(0);
                    i.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
                    startActivityForResult(i, CROP_FROM_CAMERA);
                }

                else
                {
                    for (ResolveInfo res : list) 
                    {
                        final CropOption co = new CropOption();
                        co.title = getPackageManager().getApplicationLabel(res.activityInfo.applicationInfo);
                        co.icon = getPackageManager().getApplicationIcon(res.activityInfo.applicationInfo);
                        co.appIntent= new Intent(intent);
                        co.appIntent.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
                        cropOptions.add(co);
                    }

                    CropOptionAdapter adapter = new CropOptionAdapter(getApplicationContext(), cropOptions);
                    AlertDialog.Builder builder = new AlertDialog.Builder(this);
                    builder.setTitle("Choose Crop App");
                    builder.setAdapter( adapter, new DialogInterface.OnClickListener()
                    {
                        public void onClick( DialogInterface dialog, int item )
                        {
                            startActivityForResult( cropOptions.get(item).appIntent, CROP_FROM_CAMERA);
                        }
                    });

                    builder.setOnCancelListener( new DialogInterface.OnCancelListener() 
                    {
                        public void onCancel( DialogInterface dialog ) 
                        {
                            if (mImageCaptureUri != null ) 
                            {
                                getContentResolver().delete(mImageCaptureUri, null, null );
                                mImageCaptureUri = null;
                            }
                        }
                    } );
                    AlertDialog alert = builder.create();
                    alert.show();
                }
            }
        }
        catch (Exception ex) 
        {
            genHelper.showErrorLog("Error in Crop Function-->"+ex.toString());
        }
    }
这用于显示列表

CropOptionAdapter

public class CropOptionAdapter extends ArrayAdapter<CropOption> 
{
    private ArrayList<CropOption> mOptions;
    private LayoutInflater mInflater;

    public CropOptionAdapter(Context context, ArrayList<CropOption> options) 
    {
        super(context, R.layout.crop_selector, options);

        mOptions    = options;

        mInflater   = LayoutInflater.from(context);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup group)
    {
        if (convertView == null)
            convertView = mInflater.inflate(R.layout.crop_selector, null);

        CropOption item = mOptions.get(position);

        if (item != null) {
            ((ImageView) convertView.findViewById(R.id.iv_icon)).setImageDrawable(item.icon);
            ((TextView) convertView.findViewById(R.id.tv_name)).setText(item.title);

            return convertView;
        }

        return null;
    }
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:gravity="center_vertical">

    <ImageView
        android:id="@+id/iv_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <TextView
        android:id="@+id/tv_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""/>
</LinearLayout>
//在我的live应用程序上使用这种类型

genHelper.showtoos(“此区域无作物活动”)

是帮助显示toast消息和错误日志的常规类


祝你好运。

正如类似帖子中提到的,Android没有官方的裁剪意图 (),所以我不会使用“com.android.camera.action.CROP”


然而,自从这个问题最初发布以来,Android在Kitkat(19级)中添加了一个新的API,允许用户调用裁剪图像并设置为壁纸活动。请参阅WallperManager.getCropandSetWallperIntent(),这可能会解决您最初的问题。

在用户返回到您的活动之前,只需添加裁剪方法即可。在你设置view.setImageBitmap或任何你正在做的事情通过裁剪方法之前。@Datenshi我会带着你的解决方案回来使用这个链接,这是一个可以解决你问题的演示项目代码。@Datenshi只要试试这段代码,我知道这次我没有错!!非常感谢。我会试试这个然后我有空闲时间你开始加载作物活动,加载失败:\@Datenshi亲爱的只需使用我的代码即可在我的live app中正常工作没有任何问题。亲爱的,我给你我的完整代码。在说了之后就执行。另外,如果没有找到任何作物,我会管理这件事。只需检查然后执行,然后查看。我知道这可能是我的错误用法。我正在调查。有一个问题,您将什么类型的uri传递给doCrop函数?当前我尝试传递web url,或者图像应该缓存到手机中亲爱的,请稍等几分钟我回答如果您的图像存储在图片文件夹中的sdcard中,请给出此类型的路径它的工作已完成请尝试此操作。文件路径===>/mnt/sdcard/Pictures/test02.png如何将drawable作为imageuri传递?
public class CropOptionAdapter extends ArrayAdapter<CropOption> 
{
    private ArrayList<CropOption> mOptions;
    private LayoutInflater mInflater;

    public CropOptionAdapter(Context context, ArrayList<CropOption> options) 
    {
        super(context, R.layout.crop_selector, options);

        mOptions    = options;

        mInflater   = LayoutInflater.from(context);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup group)
    {
        if (convertView == null)
            convertView = mInflater.inflate(R.layout.crop_selector, null);

        CropOption item = mOptions.get(position);

        if (item != null) {
            ((ImageView) convertView.findViewById(R.id.iv_icon)).setImageDrawable(item.icon);
            ((TextView) convertView.findViewById(R.id.tv_name)).setText(item.title);

            return convertView;
        }

        return null;
    }
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:gravity="center_vertical">

    <ImageView
        android:id="@+id/iv_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <TextView
        android:id="@+id/tv_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""/>
</LinearLayout>
/**
     * @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) 
    {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode != RESULT_OK) return;
        switch (requestCode)
        {
        case CROP_FROM_CAMERA:
            if (data == null) 
            {
                genHelper.showToast("No Crop Activity in This");
                return;
            }
            final Bundle extras = data.getExtras();
            if (extras != null) 
            {
                try 
                {

                    _tempOpration=extras.getParcelable("data");
                    imageLayout.setImageBitmap(_tempOpration);
                    _tempOpration=null;

                } 
                catch (Exception e) 
                {
                    e.printStackTrace();
                }
            }
            break;
        }

    }