Android從攝像頭或相冊中獲取照片

Android從攝像頭或相冊中獲取照片

關鍵代碼：

    /**
     * 從相冊中獲取，返回結果會在onActivityResult()中
     */
    private void selectPicFromAlbum() {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_GET_CONTENT);
        intent.setType("image/*");
        startActivityForResult(intent, RESULT_FROM_ALBUM);
    }

    /**
     * 從攝像頭中獲取，返回結果會在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;
    }

}

---

具體代碼：

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();
            }
        });
    }

    /**
     * 從相冊中獲取，返回結果會在onActivityResult()中
     */
    private void selectPicFromAlbum() {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_GET_CONTENT);
        intent.setType("image/*");
        startActivityForResult(intent, RESULT_FROM_ALBUM);
    }

    /**
     * 從攝像頭中獲取，返回結果會在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;
        }

    }
}