Android从摄像头或相册中获取照片

╰+攻爆jí腚メ 2022-08-23 08:41 206阅读 0赞

## Android从摄像头或相册中获取照片 ##

### 关键代码： ###

/**
         * 从相册中获取，返回结果会在onActivityResult()中
         */
        private void selectPicFromAlbum() {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_GET_CONTENT);
            intent.setType("image/*");
            startActivityForResult(intent, RESULT_FROM_ALBUM);
        }
    
        /**
         * 从摄像头中获取，返回结果会在onActivityResult()中
         */
        private void selectPicFromCamera() {
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(intent, RESULT_FROM_CAMERA);
        }

--------------------

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
    
        if (null == data) return;
        switch (requestCode) {
            case RESULT_FROM_ALBUM:
                Uri imageUri = data.getData();
    
                try {
                    Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
                    imageView.setImageBitmap(bitmap);
                } catch (IOException e) {
                    e.printStackTrace();
                }
    
                break;
    
            case RESULT_FROM_CAMERA:
                Bitmap bitmap = (Bitmap) data.getExtras().get("data");
                imageView.setImageBitmap(bitmap);
                break;
        }
    
    }

--------------------

### 具体代码： ###

package com.ashzheng.studydemo.demo7;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.graphics.Bitmap;
    import android.net.Uri;
    import android.os.Bundle;
    import android.provider.MediaStore;
    import android.view.View;
    import android.widget.ImageView;
    import android.widget.TextView;
    
    import com.ashzheng.studydemo.R;
    
    import java.io.IOException;
    
    public class Demo7Activity extends Activity {
    
    
        private ImageView imageView;
        private TextView textView;
    
        public static final int RESULT_FROM_ALBUM = 1;
        public static final int RESULT_FROM_CAMERA = 2;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_demo7);
    
            imageView = (ImageView) findViewById(R.id.demo7_iv);
            textView = (TextView) findViewById(R.id.demo7_tv);
    
            findViewById(R.id.demo7_bt1).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    selectPicFromAlbum();
                }
            });
    
            findViewById(R.id.demo7_bt2).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    selectPicFromCamera();
                }
            });
        }
    
        /**
         * 从相册中获取，返回结果会在onActivityResult()中
         */
        private void selectPicFromAlbum() {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_GET_CONTENT);
            intent.setType("image/*");
            startActivityForResult(intent, RESULT_FROM_ALBUM);
        }
    
        /**
         * 从摄像头中获取，返回结果会在onActivityResult()中
         */
        private void selectPicFromCamera() {
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(intent, RESULT_FROM_CAMERA);
        }
    
    
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
    
            if (null == data) return;
            switch (requestCode) {
                case RESULT_FROM_ALBUM:
                    Uri imageUri = data.getData();
    
                    try {
                        Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
                        imageView.setImageBitmap(bitmap);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
    
                    break;
    
                case RESULT_FROM_CAMERA:
                    Bitmap bitmap = (Bitmap) data.getExtras().get("data");
                    imageView.setImageBitmap(bitmap);
                    break;
            }
    
        }
    }