Android网页H5 Input选择相机和系统相册

需求：

网页h5的input选择相机和系统相册，并且返回压缩的图片到h5。

代码：

1、WebView代码

package com.zql.sdk;
 
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.webkit.JavascriptInterface;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
 
import java.io.IOException;
 

 
public class WebViewActivity extends Activity implements View.onClickListener {
  public static final String INTENT_URL = "intent_url";//请求连接
  public static final String INTENT_PARAMS_STRING = "intent_params_string";//请求参数字符串
  public static final String INTENT_REQUEST_WAY = "intent_request_way";//请求方式（POST/GET）
 
  private WebView wvShow;
  private TextView tv_back_title;
  private TextView tv_title;
  private ImageView iv_back;
  private TextView tv_right;
 
  public ValueCallback uploadMessage;
  private ValueCallback mUploadMessage;
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏
    setContentView(R.layout.activity_web_view);
 
    tv_back_title = (TextView) findViewById(R.id.tv_back_title);
    tv_title = (TextView) findViewById(R.id.tv_title);
    iv_back = (ImageView) findViewById(R.id.iv_back);
    tv_right = (TextView) findViewById(R.id.tv_right);
 
    iv_back.setonClickListener(this);
    tv_back_title.setonClickListener(this);
    tv_right.setonClickListener(this);
 
    initView();
    initData();
  }
 
  private void initData() {
    String intentUrl = getIntent().getStringExtra(INTENT_URL);
    String intentParams = getIntent().getStringExtra(INTENT_PARAMS_STRING);
    String intentRequestWay = getIntent().getStringExtra(INTENT_REQUEST_WAY);
 
    Log.e("WebView请求", "连接：" + intentUrl + "....." + "参数：" + intentParams);
 
    if (intentRequestWay.equals("GET")) {
      wvShow.loadUrl(intentUrl + "?" + intentParams);//get请求
    } else if (intentRequestWay.equals("POST")) {
      wvShow.postUrl(intentUrl, intentParams.getBytes());//post请求
    } else {
      Toast.makeText(WebViewActivity.this, "请求方式参数错误", Toast.LENGTH_SHORT).show();
    }
 
////    wvShow.loadUrl("http://qas-gw.baofoo.com/merchant_page?CODE=6d8950fc495c2a63106ce45d2647e21aec04001b53b3d7aac2f8af3b3d24f84a6c51c92843814b270eb28ead11820178fad5a20a7278f042");//get请求
//
//    String htmlData = "n" +
// "n" +
// "n" +
// "  n" +
// "  n" +
// "  n" +
// "  n" +
// "  n" +
// "  n" +
// "n" +
// "n" +
// "n" +
// "  n" +
// "   0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
   ImgUtil.openAlbum(this);
 } else {
   UiUtil.showToast(this, "选择图库需要同意权限");
 }
 break;
      case ImgUtil.REQUEST_CODE_CAMERA://相机拍照权限
 if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {//允许
   ImgUtil.openCamera(WebViewActivity.this);
 } else {//拒绝
   UiUtil.showToast(this, "只有同意相机权限,才能使用扫码功能");
 }
 break;
      default:
    }
  }
 
}

2、ImgUtil.java工具类

1）、选择相机方法（选择相机的方法还有额外的代码，具体点击这里）

2）、选择相册方法

3）、压缩图片方法

package com.zql.sdk;
 
import android.Manifest;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.alertDialog;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import android.support.annotation.RequiresApi;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.util.Log;
import android.widget.Toast;
 
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
 

 
public class ImgUtil {
  public static final int TAKE_PHOTO = 1;//拍照
  public static final int CHOOSE_PHOTO = 2;//选择相册
  public static final int REQUEST_CODE_CAMERA = 3;//相机权限请求
  public static final int REQUEST_CODE_ALBUM = 4;//相册权限请求
  public static Uri imageUri;//相机拍照图片保存地址
 
  
  public static void choicePhoto(final Activity activity) {
    //采用的是系统Dialog作为选择弹框
    new alertDialog.Builder(activity).setTitle("上传头像")//设置对话框标题
 .setPositiveButton("拍照", new DialogInterface.onClickListener() {//添加确定按钮
   @RequiresApi(api = Build.VERSION_CODES.M)
   @Override
   public void onClick(DialogInterface dialog, int which) {
 
     ArrayList permissions = new ArrayList<>();
     if (activity.checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
permissions.add(Manifest.permission.CAMERA);
     }
 
     if (permissions.size() == 0) {//有权限,跳转
//打开相机-兼容7.0
ImgUtil.openCamera(activity);
     } else {
activity.requestPermissions(permissions.toArray(new String[permissions.size()]), REQUEST_CODE_CAMERA);
     }
//     if (Build.VERSION.SDK_INT >= 23) {//检查相机权限
//ArrayList permissions = new ArrayList<>();
//if (activity.checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
//  permissions.add(Manifest.permission.CAMERA);
//}
//
//if (permissions.size() == 0) {//有权限,跳转
//  //打开相机-兼容7.0
//  openCamera(activity);
//} else {
//  activity.requestPermissions(permissions.toArray(new String[permissions.size()]), REQUEST_CODE_CAMERA);
//}
//     } else {
////打开相机-兼容7.0
//openCamera(activity);
//     }
   }
 }).
 setNegativeButton("系统相册", new DialogInterface.onClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
     //如果有权限申请，请在Activity中onRequestPermissionsResult权限返回里面重新调用openAlbum()
     if (ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CODE_ALBUM);
     } else {
openAlbum(activity);
     }
   }
 }).show();//在按键响应事件中显示此对话框
  }
 
  
  public static void openCamera(Activity activity) {
    // 创建File对象，用于存储拍照后的图片
    File outputImage = new File(activity.getExternalCacheDir(), "output_image.jpg");
    try {
      if (outputImage.exists()) {
 outputImage.delete();
      }
      outputImage.createNewFile();
    } catch (IOException e) {
      e.printStackTrace();
    }
    if (Build.VERSION.SDK_INT < 24) {
      imageUri = Uri.fromFile(outputImage);
    } else {
      //Android 7.0系统开始 使用本地真实的Uri路径不安全,使用FileProvider封装共享Uri
      //参数二:fileprovider绝对路径 com.dyb.testcamerademo：项目包名
      imageUri = FileProvider.getUriForFile(activity, "com.zql.sdk.fileprovider", outputImage);
    }
    // 启动相机程序
    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
    activity.startActivityForResult(intent, TAKE_PHOTO);
  }
 
  
  public static void openAlbum(Activity activity) {
    //调用系统图库的意图
    Intent choosePicIntent = new Intent(Intent.ACTION_PICK, null);
    choosePicIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image
  public static String getFilePath( final Context context, final Uri uri ) {
    if ( null == uri ) return null;
 
    final String scheme = uri.getScheme();
    String data = null;
 
    if ( scheme == null )
      data = uri.getPath();
    else if ( ContentResolver.SCHEME_FILE.equals( scheme ) ) {
      data = uri.getPath();
    } else if ( ContentResolver.SCHEME_CONTENT.equals( scheme ) ) {
      Cursor cursor = context.getContentResolver().query( uri, new String[] { MediaStore.Images.ImageColumns.DATA }, null, null, null );
      if ( null != cursor ) {
 if ( cursor.moveToFirst() ) {
   int index = cursor.getColumnIndex( MediaStore.Images.ImageColumns.DATA );
   if ( index > -1 ) {
     data = cursor.getString( index );
   }
 }
 cursor.close();
      }
    }
    return data;
  }
 
  
  public static byte[] getImgByteFromUri(Activity activity, Uri uri) throws IOException {
    //先进行尺寸压缩
    Bitmap bitmap = getBitmapFormUri(activity, uri);
 
    //再进行质量压缩
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);//100表示不压缩，直接放到out里面
    int options = 90;//压缩比例
    while (out.toByteArray().length / 1024 > 200) { // 循环判断如果压缩后图片是否大于100kb,大于继续压缩
      out.reset(); // 重置baos即清空baos
      bitmap.compress(Bitmap.CompressFormat.JPEG, options, out);// 这里压缩options%，把压缩后的数据存放到baos中
      options -= 10;// 每次都减少10
    }
    Log.e("压缩-提交", out.toByteArray().length + "");
 
    byte[] bs = out.toByteArray();//转换为byte提交
 
    return bs;
  }
 
  public static Uri getCompressUri(Activity activity, Uri uri) throws IOException {
    //先进行尺寸压缩
    Bitmap bitmap = getBitmapFormUri(activity, uri);
 
    Uri uriCompress = Uri.parse(MediaStore.Images.Media.insertImage(activity.getContentResolver(), bitmap, null,null));
 
//    //再进行质量压缩
//    ByteArrayOutputStream out = new ByteArrayOutputStream();
//    bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);//100表示不压缩，直接放到out里面
//    int options = 90;//压缩比例
//    while (out.toByteArray().length / 1024 > 200) { // 循环判断如果压缩后图片是否大于100kb,大于继续压缩
//      out.reset(); // 重置baos即清空baos
//      bitmap.compress(Bitmap.CompressFormat.JPEG, options, out);// 这里压缩options%，把压缩后的数据存放到baos中
//      options -= 10;// 每次都减少10
//    }
//    Log.e("压缩-提交", out.toByteArray().length + "");
//
//    byte[] bs = out.toByteArray();//转换为byte提交
 
    return uriCompress;
  }
 
 
  
  public static Bitmap getBitmapFormUri(Activity ac, Uri uri) throws FileNotFoundException, IOException {
    InputStream input = ac.getContentResolver().openInputStream(uri);
    BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();
    onlyBoundsOptions.inJustDecodeBounds = true;
    onlyBoundsOptions.inDither = true;//optional
    onlyBoundsOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;//optional
    BitmapFactory.decodeStream(input, null, onlyBoundsOptions);
    input.close();
    int originalWidth = onlyBoundsOptions.outWidth;
    int originalHeight = onlyBoundsOptions.outHeight;
    if ((originalWidth == -1) || (originalHeight == -1))
      return null;
    //图片分辨率以750x450为标准
    float hh = 800f;//这里设置高度为750f
    float ww = 800f;//这里设置宽度为450f
    float sq = 800f;//这里设置正方形为300f
    //缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
    Log.e("缩放", originalWidth + "..." + originalHeight);
    int be = 1;//be=1表示不缩放
    if (originalWidth > originalHeight && originalWidth > ww) {//如果宽度大，根据宽度固定大小缩放
      be = (int) (originalWidth / ww);
    } else if (originalWidth < originalHeight && originalHeight > hh) {//如果高度高，根据宽度固定大小缩放
      be = (int) (originalHeight / hh);
    } else if (originalWidth == originalHeight && originalWidth > sq) {//如果高度和宽度一样，根据任意一边大小缩放
      //be = (int) (originalHeight / sq);
      be = (int) (originalWidth / sq);
    }
    if (be <= 0) {//如果缩放比比1小，那么保持原图不缩放
      be = 1;
    }
    Log.e("缩放", be + "");
    //比例压缩
    BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
    bitmapOptions.inSampleSize = be;//设置缩放比例
    bitmapOptions.inDither = true;//optional
    bitmapOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;//optional
    input = ac.getContentResolver().openInputStream(uri);
    Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);
    input.close();
 
    return bitmap;//再进行质量压缩
  }
 
}

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