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Android网页H5 Input选择相机和系统相册

作者：zst1303939801

这篇文章主要为大家详细介绍了Android网页H5 Input选择相机和系统相册，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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;
 
/**
 * 浏览器组件
 * Created by zst on 2018/5/16.
 */
 
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<Uri[]> uploadMessage;
  private ValueCallback<Uri> 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 = "<!DOCTYPE html>\n" +
//        "<html>\n" +
//        "<head>\n" +
//        "  <meta charset=\"utf-8\">\n" +
//        "  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1,maximum-scale=1,user-scalable=no\">\n" +
//        "  <meta name=\"apple-mobile-web-app-capable\" content=\"yes\">\n" +
//        "  <meta name=\"apple-mobile-web-app-status-bar-style\" content=\"black\">\n" +
//        "  <title>修改资料</title>\n" +
//        "  <script src=\"./jquery-1.8.3.js\"></script>\n" +
//        "</head>\n" +
//        "\n" +
//        "<body>\n" +
//        "  <div className=\"image-uploader\">\n" +
//        "  <input id=\"imgInput\" className=\"imgInput\" type=\"file\" accept=\"image/*\" />\n" +
//        "  <img id=\"imgShow\" className=\"imgShow\" />\n" +
//        " </div>\n" +
//        "\n" +
//        "<script> \n" +
//        " $('#imgInput').change(function () {\n" +
//        "  readURL(this);\n" +
//        "});\n" +
//        "\n" +
//        "function readURL(input){\n" +
//        " if (input.files && input.files[0]) {\n" +
//        "  const reader = new FileReader();\n" +
//        "  reader.readAsDataURL(input.files[0]);\n" +
//        "  reader.onload = (e) => {\n" +
//        "    $('#imgShow').attr('src', e.target.result);\n" +
//        "   };\n" +
//        "  };\n" +
//        " };\n" +
//        "</script>\n" +
//        "</body>\n" +
//        "</html>";
//
//    Log.e("网页", htmlData);
//
//    wvShow.loadDataWithBaseURL(null, htmlData, "text/html", "utf-8", null);
  }
 
  private void initView() {
    wvShow = (WebView) findViewById(R.id.wv_body);
    wvShow.getSettings().setJavaScriptEnabled(true);//允许与js 交互
    wvShow.getSettings().setDefaultTextEncodingName("utf-8");//支持中文
    //在js中调用本地java方法
    wvShow.addJavascriptInterface(new JsInterface(this), "androidYZH");
    wvShow.getSettings().setDomStorageEnabled(true);//允许缓存、开启DOM（双重重定向白屏问题）
    wvShow.setWebViewClient(new WebViewClient() {
      //覆盖shouldOverrideUrlLoading 方法
      @Override
      public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if (url == null) return false;
        try {
          if (url.startsWith("http:") || url.startsWith("https:")) {
            view.loadUrl(url);
            return true;
          } else {
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
            startActivity(intent);
            return true;
          }
        } catch (Exception e) { //防止crash (如果手机上没有安装处理某个scheme开头的url的APP, 会导致crash)
          return false;
        }
      }
    });
    wvShow.setWebChromeClient(new WebChromeClient() {//监听网页加载
      @Override
      public void onProgressChanged(WebView view, int newProgress) {
//        if (newProgress == 100) {
//          // 网页加载完成
//          pbProgress.setVisibility(View.GONE);
//        } else {
//          // 加载中
//          pbProgress.setProgress(newProgress);
//        }
        super.onProgressChanged(view, newProgress);
      }
 
      @Override
      public void onReceivedTitle(WebView view, String title) {
        super.onReceivedTitle(view, title);
        tv_title.setText(title);
      }
 
      public void openFileChooser(ValueCallback<Uri> uploadMsg) {
        Log.e("点击", "1");
        ImgUtil.choicePhoto(WebViewActivity.this);
      }
 
      public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
        openFileChooser(uploadMsg);
        Log.e("点击", "3");
      }
 
      public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
        openFileChooser(uploadMsg);
        Log.e("点击", "4");
      }
 
      @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
      public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
        if (uploadMessage != null) {
          uploadMessage.onReceiveValue(null);
          uploadMessage = null;
        }
        uploadMessage = filePathCallback;
        Log.e("点击", "2");
        ImgUtil.choicePhoto(WebViewActivity.this);
        return true;
      }
 
    });
 
  }
 
  @Override
  public void onClick(View v) {
    int i = v.getId();
    if (i == R.id.iv_back) {
      if (wvShow.canGoBack()) {
        wvShow.goBack();
      } else {
        finish();
      }
    } else if (i == R.id.tv_back_title) {
      finish();
    }
  }
 
  /**
   * js调用原生方法
   */
  private class JsInterface {
    private Context mContext;
 
    public JsInterface(Context context) {
      this.mContext = context;
    }
 
    @JavascriptInterface
    public void closeH5(String name) {//关闭sdk
      Log.e("网页", "方法入参：" + name);
 
      finish();
    }
 
    @JavascriptInterface
    public void downloadFile(String name) {//下载文件
      Log.e("网页", "方法入参：" + name);
 
      //这里是把地址用默认浏览器打开，在浏览器中下载
      Uri uri = Uri.parse(name);
      Intent intent = new Intent();
      intent.setAction("android.intent.action.VIEW");
      intent.setData(uri);
      startActivity(intent);
    }
  }
 
  //重写Activity的onKeyDown事件，判断当用户按下“返回”按钮，webview返回上一页
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK) && wvShow.canGoBack()) {
      wvShow.goBack();
      return true;
    } else {
      finish();
    }
 
    return super.onKeyDown(keyCode, event);
  }
 
  @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
 
    if (resultCode == RESULT_OK) {//正确返回
      switch (requestCode) {
        case ImgUtil.TAKE_PHOTO://相机返回
          Log.e("返回相机", ImgUtil.imageUri.toString());
 
          //相机返回rui
          //Uri uriTake = ImgUtil.imageUri;
          Uri uriTake = null;
          try {
            uriTake = ImgUtil.getCompressUri(WebViewActivity.this, ImgUtil.imageUri);
          } catch (IOException e) {
            e.printStackTrace();
          }
          //显示在页面
          if (uploadMessage == null) return;
          Uri[] imgTaskUris = {uriTake};
          uploadMessage.onReceiveValue(imgTaskUris);
          uploadMessage = null;
          if (null == mUploadMessage) return;
          Uri result = intent == null || resultCode != MainActivity.RESULT_OK ? null : uriTake;
          mUploadMessage.onReceiveValue(result);
          mUploadMessage = null;
 
          break;
        case ImgUtil.CHOOSE_PHOTO://相册返回
          try {
            if (intent != null) {
              //相册返回
              Log.e("返回", "intent2:" + intent.getData().toString() + "..." + uploadMessage);
              //相册返回uri
              //Uri uriChoose = intent.getData();
              Uri uriChoose = ImgUtil.getCompressUri(WebViewActivity.this, intent.getData());
              //显示在页面
              if (uploadMessage == null) return;
              Uri[] imgChooseUris = {uriChoose};
              uploadMessage.onReceiveValue(imgChooseUris);
              //uploadMessage.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, intent));
              uploadMessage = null;
 
              Log.e("返回", "intent3:" + WebChromeClient.FileChooserParams.parseResult(resultCode, intent).toString());
            }
            break;
          } catch (Exception e) {
            e.printStackTrace();
            UiUtil.showToast(this, "图片选择失败");
          }
          break;
      }
    } else {
      UiUtil.showToast(this, "图片选择失败");
    }
  }
 
  @Override
  public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
      case ImgUtil.REQUEST_CODE_ALBUM://相册存储权限
        if (grantResults.length > 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;
 
/**
 * 图片工具类
 * Created by xiaoshuai on 2018/8/17.
 */
 
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
 
  /**
   * 选择图片，从图库、相机
   *
   * @param activity 上下文
   */
  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<String> 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<String> 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
  }
 
  /**
   * 打开相机
   * 兼容7.0
   *
   * @param activity
   */
  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);
  }
 
  /**
   * 打开图库
   * @param activity
   */
  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/*");
    activity.startActivityForResult(choosePicIntent, CHOOSE_PHOTO);
 
    //打开系统默认的软件
    //Intent intent = new Intent("android.intent.action.GET_CONTENT");
    //intent.setType("image/*");
    //activity.startActivityForResult(intent, CHOOSE_PHOTO); // 打开相册
  }
 
  /**
   * 通过uri获取路径filepath
   * @param context
   * @param uri
   * @return
   */
  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;
  }
 
  /**
   * 得到byte[]
   * LeanCloud上传文件是需要byte[]数组的
   * 这里对传入的图片Uri压缩，并转换为byte[]后返回
   *
   * @param activity 上下文
   * @param uri   传入图片的Uri
   * @return byte[]
   */
  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;
  }
 
 
  /**
   * 图片尺寸压缩
   *
   * 宽度高度不一样：依靠规定的高或宽其一最大值来做界限
   * 高度宽度一样：依照规定的宽度压缩
   *
   * @param uri
   */
  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
  }
 
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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