Android Camera拍照压缩-白红宇

Android Camera拍照压缩

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发布时间：2019-06-09

本文共 10102 字，大约阅读时间需要 33 分钟。

package com.klp.demo_025; import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream; import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.provider.MediaStore;import android.view.View;import android.widget.Button;import android.widget.ImageView; public class MainActivity extends Activity {     private ImageView iv;    private Button button;    private File file;    private Uri uri;     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        iv = (ImageView) findViewById(R.id.imageView1);        button = (Button) findViewById(R.id.button1);         file = new File(this.getExternalFilesDir(null), "image.jpg");        uri = Uri.fromFile(file);         button.setOnClickListener(new View.OnClickListener() {             @Override            public void onClick(View v) {                // TODO Auto-generated method stub                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);                intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0);                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);                startActivityForResult(intent, 2);            }        });     }     @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == RESULT_OK) {            if (requestCode == 2) {                startPhotoZoom(uri);            } else {                try {                    BitmapFactory.Options options = new BitmapFactory.Options();                    options.inSampleSize = 2;                    Bitmap bitmap = BitmapFactory.decodeFile(file.getPath(),                            options);                    // 压缩图片//                    bitmap = compressImage(bitmap,500);                     if (bitmap != null) {                        // 显示图片                        iv.setImageBitmap(bitmap);                        // 保存图片                        FileOutputStream fos = null;                        fos = new FileOutputStream(file);                        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);                        fos.flush();                        fos.close();                    }                } catch (Exception e) {                    // TODO: handle exception                 }            }         }     }     /**    * 裁剪图片    *     * @param uri    */    public void startPhotoZoom(Uri uri) {        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*");        intent.putExtra("crop", "true");// crop=true 有这句才能出来最后的裁剪页面.        intent.putExtra("aspectX", 1);// 这两项为裁剪框的比例.        intent.putExtra("aspectY", 1);// x:y=1:1        intent.putExtra("outputX", 200);//图片输出大小        intent.putExtra("outputY", 200);        intent.putExtra("output", uri);        intent.putExtra("outputFormat", "JPEG");// 返回格式        startActivityForResult(intent, 3);    }     /**    * 将图片image压缩成大小为 size的图片（size表示图片大小，单位是KB）    *     * @param image    *            图片资源    * @param size    *            图片大小    * @return Bitmap    */    private Bitmap compressImage(Bitmap image, int size) {         ByteArrayOutputStream baos = new ByteArrayOutputStream();        // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);        int options = 100;        // 循环判断如果压缩后图片是否大于100kb,大于继续压缩        while (baos.toByteArray().length / 1024 > size) {            // 重置baos即清空baos            baos.reset();            // 每次都减少10            options -= 10;            // 这里压缩options%，把压缩后的数据存放到baos中            image.compress(Bitmap.CompressFormat.JPEG, options, baos);         }        // 把压缩后的数据baos存放到ByteArrayInputStream中        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());        // 把ByteArrayInputStream数据生成图片        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);        return bitmap;    } }

package com.carloz.invokecamera;import android.content.ContentValues;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.SystemClock;import android.provider.MediaStore;import android.support.v7.app.ActionBarActivity;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;public class InvokeCameraActivity extends ActionBarActivity {    private String TAG = "CARLOZ";    private ImageView iv;    private Button button;    private File file;    private Uri uri;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_invoke_camera);        iv = (ImageView) findViewById(R.id.imageView1);        button = (Button) findViewById(R.id.button1);        file = new File("/data/sdcard/DCIM/Camera/carloz.jpg");        uri = Uri.fromFile(file);//        String imageName = "carlo" + System.currentTimeMillis();//        ContentValues values = new ContentValues();//        values.put(MediaStore.Images.Media.TITLE, imageName);//        values.put(MediaStore.Images.Media.DISPLAY_NAME, imageName+".ipg");//        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpg");//        uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);        Log.d(TAG, "onCreate - uri: " + uri);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent();                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);                //intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0);                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);                startActivityForResult(intent, 3);            }        });    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        Log.d(TAG, "onActivityResult requestCode=" + requestCode                + ", resultCode=" + resultCode                + ", data=" + data);        if (resultCode == RESULT_OK) {            switch (requestCode) {                case 1:                    iv.setImageURI(uri);                    break;                case 2:                    startPhotoZoom(uri);                    break;                case 3:                    try {                        Log.d(TAG, "onActivityResult BitmapFactory filepath: " + file.getAbsolutePath());                        //BitmapFactory.Options options = new BitmapFactory.Options();                       // options.inSampleSize = 2;                        InputStream is = new FileInputStream(file.getAbsolutePath());// 读出指定的文件，二进制流                        Bitmap bitmap = BitmapFactory.decodeStream(is);                        //Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath());                        //bitmap = compressImage(bitmap,500);                        if (bitmap != null) {                            Log.d(TAG, "onActivityResult bitmap != null");                            iv.setImageBitmap(bitmap);                        }else{                            Log.d(TAG, "onActivityResult - bitmap is null");                        }                        is.close();                    } catch (Exception e) {                        // TODO: handle exception                        Log.d(TAG, "onActivityResult - BitmapFactory Exception: " + e.toString());                    }                    break;                default:                    Log.d(TAG, "onActivityResult - request code not define !");                    break;            }        }else{            Log.d(TAG, "onActivityResult - RESULT NOT OK");        }        super.onActivityResult(requestCode, resultCode, data);    }    /**     * 裁剪图片     *     * @param uri     */    public void startPhotoZoom(Uri uri) {        Log.d(TAG, "startPhotoZoom - uri: " + uri.toString());        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*");        intent.putExtra("crop", "true");// crop=true 有这句才能出来最后的裁剪页面.        intent.putExtra("aspectX", 1);// 这两项为裁剪框的比例.        intent.putExtra("aspectY", 1);// x:y=1:1        intent.putExtra("outputX", 200);//图片输出大小        intent.putExtra("outputY", 200);        intent.putExtra("output", uri);        intent.putExtra("outputFormat", "jpg");// 返回格式        startActivityForResult(intent, 3);    }    /**     * 将图片image压缩成大小为 size的图片（size表示图片大小，单位是KB）     *     * @param image 图片资源     * @param size  图片大小     * @return Bitmap     */    private Bitmap compressImage(Bitmap image, int size) {        Log.d(TAG, "compressImage - size: " + size);        ByteArrayOutputStream baos = new ByteArrayOutputStream();        // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);        int options = 100;        // 循环判断如果压缩后图片是否大于100kb,大于继续压缩        while (baos.toByteArray().length / 1024 > size) {            // 重置baos即清空baos            baos.reset();            // 每次都减少10            options -= 10;            // 这里压缩options%，把压缩后的数据存放到baos中            image.compress(Bitmap.CompressFormat.JPEG, options, baos);        }        // 把压缩后的数据baos存放到ByteArrayInputStream中        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());        // 把ByteArrayInputStream数据生成图片        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);        return bitmap;    }}

转载于:https://www.cnblogs.com/carlo/p/4743263.html

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