郭霖大神相机代码解决

|概要

目的/意义：这篇文章的目的在于避免新手入坑，大神可以点击X出去了，因为我刚好开始学安卓，所以我觉得有必要分享一下啦

开发环境：Android Studio

关键词：\

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|正式内容

以下是郭霖大神的调取摄像头完成拍照功能的完整代码，可以拷贝

package com.example.administrator.demo;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Build;

import android.provider.MediaStore;

import android.support.v4.content.FileProvider;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

public class UserManagementActivity extends AppCompatActivity {    

public static final int TAKE_PHOTO = 1;    

private ImageView picture;    

private Uri imageUri;    

@Override    

protected void onCreate(Bundle savedInstanceState) {        

super.onCreate(savedInstanceState);        

setContentView(R.layout.activity_user_management);        

Button takePhoto = findViewById(R.id.take_photo);        

picture = findViewById(R.id.picture);        

takePhoto.setOnClickListener(new View.OnClickListener() {            

@Override            

public void onClick(View view) {                

//创建File对象，用于存储拍照后的图片                

File outputImage = new File(getExternalCacheDir(),"output_image.jpg");                

try{                    

if (outputImage.exists()){                        

outputImage.delete();                    

}                    

outputImage.createNewFile();                

} catch (IOException e){                    

e.printStackTrace();                

}                

if (Build.VERSION.SDK_INT >= 24 ){                    

imageUri = FileProvider.getUriForFile(UserManagementActivity.this,"com.example.administrator.demo.fileprovider",outputImage);                

} else {                    

imageUri = Uri.fromFile(outputImage);                

}                

//启动相机程序                

Intent intent = new Intent ("android.media.action.IMAGE_CAPTURE");                

intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);                

startActivityForResult(intent,TAKE_PHOTO);            

}        

});    

}    

@Override    

protected void onActivityResult(int requestCode, int resultCode, Intent data){        switch (requestCode){            

case TAKE_PHOTO:                

if (resultCode == RESULT_OK){                    

try {                        

//将拍摄的照片显示出来                        

Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));                        

picture.setImageBitmap(bitmap);                    

} catch (FileNotFoundException e){                        

e.printStackTrace();                    }                

}                

break;                

default:                    break;        

}    

}}

我从文本里面复制出来粘贴在简书的编辑器后代码就成了这样，不要吐槽我代码风格不好

这里，一般新手都会添加一个权限打开，但是以上代码的实现是不需要打开android.permission.CAMERA该权限的

即意思是把android.permission.CAMERA注释掉了就可以运行成功