android拍照选择图片上传服务器自定义控件

做android项目的时候总免不了遇到图片上传功能，虽然就是调用android系统的拍照和相册选择功能，但是总面部了把一大推代码写在activity里，看上去一大推代码头都昏了。不如把这些功能都集成一个控件，以后遇到图片上传功能也不用那么麻烦了。好啦，下面开始上效果图。

</pre><pre name="code" class="java" style="font-size: 11.8181819915771px;">

</pre><pre name="code" class="java" style="font-size: 11.8181819915771px;">

效果图就是这样了，我们看效果图可以分析出大致的功能就是：一个Imageview里默认有一张图片，我们在选择了图片以后右上角有个删除的Imageview，点击以后可以删除选择的图片，那实际上就是一个FrameLayout嘛，好，下面开始贴代码。基本看代码都能看懂了，需要注意的是做了一下图片压缩的处理。因为不做压缩的话一个图片拍下来都是几兆大小，上传完全不可行。

</pre><pre name="code" class="java" style="font-size: 11.8181819915771px;">自定义控件代码

</pre><pre name="code" class="java">

public class ImagePicker extends FrameLayout implements View.OnClickListener {

    private SelectType selectType; //选择的类型照相和选择

    private Context context;

    private ImageView imageView;

    private ImageView deleteImageView;

    private int imageViewWidth;

    private int imageViewHeight;

    private boolean hasImage;

    private String imagePath;

    private File file;

    private LinearLayout dialogView;

    private AlertDialog dialog;

    private int scaleWidth=240;
    private int scaleHeight=240;

    public void setScale(int width,int height){
        this.scaleWidth=width;
        this.scaleHeight=height;
    }

    public ImagePicker(Context context) {
        super(context);
        this.context=context;
    }

    public ImagePicker(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.context=context;
    }

    public ImagePicker(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        this.context=context;
    }

    public boolean hasImage(){
        return this.hasImage;
    }

    public String getImagePath(){
        return this.imagePath;
    }

    public void setImagePath(String path){
        File file=new File(path);
        if(!file.exists()){
            clearImagePicker();
            return;
        }
        Bitmap bitmap=ImageUtils.getInstance().decodeSampledBitmap(file,imageViewWidth,imageViewHeight);
        if(bitmap==null){
            clearImagePicker();
            return;
        }
        int degree = ImageUtils.getInstance().readPicDegree(path);
        if(degree>0){
            bitmap=ImageUtils.getInstance().rotateBitmap(degree,bitmap);
        }
        imageView.setImageBitmap(bitmap);
        imagePath=path;
        hasImage=true;
        deleteImageView.setVisibility(View.VISIBLE);
    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == Activity.RESULT_OK&&
                requestCode == getId()) {
            if(selectType==null){
                selectType=SelectType.CAMERA;
            }
            switch (selectType){
                case CAMERA:
                    onCameraResult(data);
                    break;
                case PHOTO:
                    onPhotoResult(data);
                    break;
            }
        }
    }

    private void onPhotoResult(Intent data){
        Uri originalUri = data.getData();
        Cursor cursor = ((Activity)context).managedQuery(originalUri, new String[]{MediaStore.Images.Media.DATA}, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String path = cursor.getString(column_index);

        try {
            File tmpFile=compressImage(path);
            setImagePath(tmpFile.getPath());
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(context,"压缩图片失败",Toast.LENGTH_SHORT).show();
            clearImagePicker();
            return;
        }

    }

    private void onCameraResult(Intent data){
        try {
            File tmpFile=compressImage(file.getPath());
            setImagePath(tmpFile.getPath());
            file.delete();
            file=tmpFile;
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(context,"压缩图片失败",Toast.LENGTH_SHORT).show();
            clearImagePicker();
            return;
        }
    }

    private File compressImage(String path) throws IOException {
        //图片翻转角度
        int degree=ImageUtils.getInstance().readPicDegree(path);

        //缩放
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        newOpts.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(path,newOpts);
        newOpts.inJustDecodeBounds = false;
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        int be = 1;
        if (w > h && w > scaleWidth) {
            be = newOpts.outWidth / scaleWidth;
        } else if (w < h && h > scaleHeight) {
            be = newOpts.outHeight / scaleHeight;
        }
        if (be <= 0){
            be = 1;
        }
        newOpts.inSampleSize = be;
        Bitmap bitmap = BitmapFactory.decodeFile(path, newOpts);
        if(degree>0){
            bitmap=ImageUtils.getInstance().rotateBitmap(degree,bitmap);
        }

        //压缩
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        int options = 100;
        while ( baos.toByteArray().length / 1024>100) {  //循环判断如果压缩后图片是否大于100kb,大于继续压缩
            options -= 10;
            baos.reset();
            bitmap.compress(Bitmap.CompressFormat.JPEG, options, baos);
        }

        //保存
        String name = new DateFormat().format("yyyyMMddhhmmss", Calendar.getInstance()) + ".jpg";
        File file = new File(SDCardUtils.getImageDir(context),name);
        FileOutputStream b = new FileOutputStream(file);
        baos.writeTo(b);
        baos.close();
        b.close();
        return file;
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        imageView=(ImageView)this.findViewById(R.id.ImagePicker_ImageView);
        deleteImageView=(ImageView)this.findViewById(R.id.ImagePicker_ImageDelete);
        imageView.setOnClickListener(this);
        deleteImageView.setOnClickListener(this);
        deleteImageView.setVisibility(View.GONE);

        dialogView=(LinearLayout)LayoutInflater.from(this.context).inflate(R.layout.image_picker_dialog_layout,null);
        dialogView.findViewById(R.id.ImagePicker_PhotoBtn).setOnClickListener(this);
        dialogView.findViewById(R.id.ImagePicker_CameraBtn).setOnClickListener(this);
        dialogView.findViewById(R.id.ImagePicker_CancelBtn).setOnClickListener(this);

    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        imageViewWidth=imageView.getWidth();;
        imageViewHeight=imageView.getHeight();;

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.ImagePicker_ImageView:
                showImagePickerDialog();
                break;
            case R.id.ImagePicker_ImageDelete:
                clearImagePicker();
                break;
            case R.id.ImagePicker_CameraBtn:
                showCameraApp();
                break;
            case R.id.ImagePicker_PhotoBtn:
                showPhotoApp();
                break;
            case R.id.ImagePicker_CancelBtn:
                closeDialog();
                break;
        }
    }

    private void closeDialog(){
        dialog.dismiss();
        dialog=null;
    }

    private void showImagePickerDialog(){
        ViewGroup parent=(ViewGroup)dialogView.getParent();
        if(parent!=null){
            parent.removeView(dialogView);
        }
        dialog= new AlertDialog.Builder(context).setTitle("图片选择")
                .setView(dialogView).create();
        dialog.show();
    }

    private void showPhotoApp(){
        selectType=SelectType.PHOTO;
        Intent photoIntent= new Intent(Intent.ACTION_GET_CONTENT);
        photoIntent.setType("image/*");
        ((Activity)context).startActivityForResult(photoIntent, getId());
        closeDialog();
    }

    private void showCameraApp(){
        if(!SDCardUtils.hasSDCard()){
            Toast.makeText(context,"请插入sd卡",Toast.LENGTH_SHORT).show();
            return;
        }
        String name = new DateFormat().format("yyyyMMddhhmmss", Calendar.getInstance()) + ".jpg";
        file = new File(SDCardUtils.getImageDir(context),name);
        selectType=SelectType.CAMERA;
        Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
        ((Activity)context).startActivityForResult(cameraIntent, getId());
        closeDialog();
    }

    public void clearImagePicker(){
        hasImage=false;
        imagePath=null;
        imageView.setImageResource(R.drawable.image_picker_add);
        deleteImageView.setVisibility(View.GONE);
    }

    enum SelectType{
        PHOTO,CAMERA
    }
}

</pre><p></p><p>我们的控件布局是这样的。</p><p></p><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<com.example.imageUpload.widget.ImagePicker xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="match_parent"
             android:layout_height="match_parent">
    <ImageView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_margin="10dip"
            android:id="@+id/ImagePicker_ImageView"
            android:layout_gravity="center"
            android:src="@drawable/image_picker_add"
            android:scaleType="fitXY"/>
    <ImageView
            android:layout_width="20dip"
            android:layout_height="20dip"
            android:id="@+id/ImagePicker_ImageDelete"
            android:src="@drawable/image_picker_delete"
            android:layout_gravity="right|top" />
</com.example.imageUpload.widget.ImagePicker>

下面开始使用吧！在activity的xml文件里面include一下就可以了，布局代码我就不贴了，来看activity里面。我们需要重写一下onActivityResult，

上传文件我们无非就是用到  //imagePicker1.getImagePath();得到图片的路径

        //imagePicker1.hasImage();是否有图片。

public class MyActivity extends Activity {

    private ImagePicker imagePicker1;
    private ImagePicker imagePicker2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imagePicker1 = (ImagePicker)findViewById(R.id.imagePicker1);
        imagePicker2 = (ImagePicker)findViewById(R.id.imagePicker2);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        imagePicker1.onActivityResult(requestCode, resultCode, data);
        imagePicker2.onActivityResult(requestCode,resultCode,data);
        //imagePicker1.getImagePath();
        //imagePicker1.hasImage();
    }
}

源码下载