踩坑日记:Android7.0 以上调用系统摄像头相册 等问题

版权声明：https://mp.csdn.net/postedit

 用到了摄像头 所以就写了下，网上大神的特别多，我也就扣扣改改，先上图
 

点击按钮

点击拍照

点击从相册中选择则

大致效果都在上面了，接着贴代码

先上xml

 

只有一个Activity

package com.example.yangzhan.camreatest;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.zxy.tiny.Tiny;
import com.zxy.tiny.callback.FileWithBitmapCallback;

import java.io.File;
import java.io.IOException;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private static final String TAG ="MainActivity";
    //调用系统摄像头请求码
    private static final int MY_ADD_CASE_CALL_PHONE = 6;
    //调用系统相册请求码
    private static final int MY_ADD_CASE_CALL_PHONE2 = 7;

    private Button mBtnCall;
    private ImageView mImg;
    private AlertDialog mDlg;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mBtnCall =findViewById(R.id.btCall);
        mImg =findViewById(R.id.image);

        mBtnCall.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btCall:
                Log.e(TAG, "onClick: ");
                showDilg();
                break;
            case R.id.photograph:
                Log.e(TAG, "onClick2: ");
                CallCamera();
                break;
            case R.id.photo:
                Log.e(TAG, "onClick3: ");
                CallingAlbum();
                break;
            case R.id.cancel:
                Log.e(TAG, "onClick4: ");
                mDlg.dismiss();
                break;
                default:
                    break;
        }
    }

    private void CallingAlbum() {
        //6.0动态申请权限，摄像头权限，SD卡写入取权限
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED
                && ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.WRITE_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(MainActivity.this, new String[] {Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE},MY_ADD_CASE_CALL_PHONE
            );
        }else {
            choosePhoto();
        }

        mDlg.dismiss();
    }

    /**
     * 打开相册
     */
    private void choosePhoto() {
        //这是打开系统默认的相册(就是你系统怎么分类,就怎么显示,首先展示分类列表)
        Intent picture = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(picture, 2);
    }

    private void CallCamera() {
        //6.0动态申请权限，摄像头权限，SD卡读取权限
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED
                && ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.WRITE_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(MainActivity.this, new String[] {Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE},MY_ADD_CASE_CALL_PHONE
            );
        }else {
            try{
                takePhoto();
            }catch (Exception e){e.printStackTrace();}
        }

        mDlg.dismiss();
    }

    private void takePhoto() throws IOException {
        Intent intent = new Intent();
        intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
        // 获取文件
        File file = createFileIfNeed("UserIcon.png");
        //拍照后原图回存入此路径下
        Uri uri;
        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) {
            uri = Uri.fromFile(file);
        } else {
            /**
             * 7.0 调用系统相机拍照不再允许使用Uri方式，应该替换为FileProvider
             * 并且这样可以解决MIUI系统上拍照返回size为0的情况
             */
            uri = FileProvider.getUriForFile(this, "com.example.yangzhan.camreatest.fileprovider", file);
        }
        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
        startActivityForResult(intent, 1);
    }

    // 在sd卡中创建一保存图片（原图和缩略图共用的）文件夹
    private File createFileIfNeed(String fileName) throws IOException {
        String fileA = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath() + "/nbinpic";
        File fileJA = new File(fileA);
        if (!fileJA.exists()) {
            fileJA.mkdirs();
        }
        File file = new File(fileA, fileName);
        if (!file.exists()) {
            file.createNewFile();
        }
        return file;
    }

    private void showDilg(){
        AlertDialog.Builder builder =new AlertDialog.Builder(this);
        View layout = getLayoutInflater().inflate(R.layout.dialog_select_photo,null);
        builder.setView(layout);

        mDlg = builder.create();
        Window window = mDlg.getWindow();
        window.setGravity(Gravity.BOTTOM);
        mDlg.setCanceledOnTouchOutside(true);
        Log.e(TAG, "showDilg: " );
        mDlg.show();

        WindowManager manager = getWindowManager();
        Display d=manager.getDefaultDisplay();
        WindowManager.LayoutParams p= mDlg.getWindow().getAttributes();
        p.width=d.getWidth();

        window.setBackgroundDrawable(new ColorDrawable(0));

        TextView button1 = layout.findViewById(R.id.photograph);
        TextView button2 = layout.findViewById(R.id.photo);
        TextView button3 = layout.findViewById(R.id.cancel);


        button1.setOnClickListener(this);
        button2.setOnClickListener(this);
        button3.setOnClickListener(this);
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == MY_ADD_CASE_CALL_PHONE) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                try {
                    takePhoto();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } else {
                //"权限拒绝");
                Toast.makeText(this, "请求摄像头权限被拒绝了", Toast.LENGTH_SHORT).show();
            }
        }


        if (requestCode == MY_ADD_CASE_CALL_PHONE2) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                choosePhoto();
            } else {
                //"权限拒绝");
                Toast.makeText(this, "请求SDka权限被拒绝了", Toast.LENGTH_SHORT).show();
            }
        }
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1 && resultCode != Activity.RESULT_CANCELED) {

            String state = Environment.getExternalStorageState();
            if (!state.equals(Environment.MEDIA_MOUNTED)) return;
            // 把原图显示到界面上
            Tiny.FileCompressOptions options = new Tiny.FileCompressOptions();
            Tiny.getInstance().source(readpic()).asFile().withOptions(options).compress(new FileWithBitmapCallback() {

                @Override
                public void callback(boolean isSuccess, Bitmap bitmap, String outfile, Throwable t) {
                    saveImageToServer(bitmap, outfile);
                }
            });

        } else if (requestCode == 2 && resultCode == Activity.RESULT_OK
                && null != data) {
            try {
                Uri selectedImage = data.getData();
                Tiny.FileCompressOptions options = new Tiny.FileCompressOptions();
                Tiny.getInstance().source(selectedImage).asFile().withOptions(options).compress(new FileWithBitmapCallback() {
                    @Override
                    public void callback(boolean isSuccess, Bitmap bitmap, String outfile, Throwable t) {
                        saveImageToServer(bitmap, outfile);
                    }
                });
            } catch (Exception e) {
                //"上传失败");
            }
        }
    }

    /**
     * 从保存原图的地址读取图片
     */
    private String readpic() {
        String filePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath() + "/nbinpic/" + "UserIcon.png";

        return filePath;
    }

    private void saveImageToServer(final Bitmap bitmap, String outfile) {
        File file = new File(outfile);
        mImg.setImageBitmap(bitmap);
    }
}

 

主要注意几点问题：

1.动态权限申请

2.7.0以上的系统 出于安全考虑，不会将手机真是路径反馈给你需要xml中建立file_paths文件，用于映射apk位置

获取路径改为：

uri = FileProvider.getUriForFile(this, "com.example.yangzhan.camreatest.fileprovider", file);

并且在清单文件中加入

不然会报错，其他到在注释中都有。。。