Android 拍照与视频拍摄

た入场券 2024-02-18 16:28 79阅读 0赞

(1) 掌握相机的启动方法；

(2) 掌握拍照拍摄后图片、视频的存储方法；

(3) 掌握照片的读取方法；

Activity:

package com.example.leidaiwen3006sy7;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    
    import android.R.integer;
    import android.R.string;
    import android.app.Activity;
    import android.content.Intent;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.graphics.BitmapFactory.Options;
    import android.net.Uri;
    import android.os.Bundle;
    import android.os.Environment;
    import android.provider.MediaStore;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.ImageView;
    
    public class MainActivity extends Activity {
        private Button btn ;
        private ImageView imageView ;
        private final static int request_code = 100;
        private File dis;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            btn = (Button)findViewById(R.id.btn);
            btn.setOnClickListener(listener);
            imageView = (ImageView)findViewById(R.id.image);
        }
        
        private OnClickListener listener = new OnClickListener() {
    		
    		@Override
    		public void onClick(View v) {
    			String pathString = Environment.getExternalStorageDirectory().getAbsolutePath()+"/pic";
    			File dir = new File(pathString);
    			if(!dir.exists()){
    				dir.mkdirs();
    			}
    			String name = pathString + "/" + System.currentTimeMillis()+".jsp";
    			dis = new File(name);
    			//启动相机
    			Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    			intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(dis));
    			startActivityForResult(intent, request_code);
    		}
    	};
    	
    	@Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    		if(requestCode == request_code && resultCode == RESULT_OK){
    			try {
    				FileInputStream fis = new FileInputStream(dis);
    		        Options options = new Options();
    		        options.inSampleSize = 10;
    		        Bitmap bitmap = BitmapFactory.decodeStream(fis, null, options);
    		        imageView.setImageBitmap(bitmap);
    		        //广播通知系统，刷新数据库，将我们的存储位置保存到数据库
    		        sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,Uri.fromFile(dis)));
    			} catch (FileNotFoundException e) {
    				e.printStackTrace();
    			}
    		}
        }
    }

xml:

![Center][]

视频：

public class MainActivity extends Activity {
        Button capteButton;
    	TextView ktTextView;
    	File destination;
    	private static final int REQUEST_VIDEO=110;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
           capteButton=(Button)findViewById(R.id.capterBtn);
           capteButton.setOnClickListener(listener);
           ktTextView=(TextView) findViewById(R.id.display);  
        }
        private View.OnClickListener listener=new View.OnClickListener() {
    		public void onClick(View v) {
    String pathString=Environment.getExternalStorageDirectory().getAbsolutePath()+"/TestVdo";
    File dir=new File(pathString);
     if(!dir.exists()){dir.mkdirs();}
    String name=pathString+"/"+System.currentTimeMillis()+".mp4";
    destination=new File(name);
    			
    Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
    			//intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT,10);
    			intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
    			intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(destination));
    			startActivityForResult(intent,REQUEST_VIDEO);
    		}
    	};
    	@Override
    	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    		if(requestCode==REQUEST_VIDEO&&resultCode==Activity.RESULT_OK)
    		{   String saveLocation=data.getData().toString();
    			ktTextView.setText(saveLocation);
    			Toast.makeText(MainActivity.this, "拍摄成功", Toast.LENGTH_SHORT).show();	
    		//广播通知系统刷新数据库，将我们存储的位置保存到数据库
    			sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,Uri.fromFile(destination)));
    		} 	 
        }
    }

[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/0132f3717f20465888203d274f446fbb.png