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android相机调用

时间:2024-3-2 17:32     作者:韩俊     分类: Android


来自第一行代码笔记
1、调用摄像头活动拍照
2、拍照完返回到onActivityResult,裁剪
3、裁剪完返回到onActivityResult,显示图片
4、从相册选取图片,启动裁剪,显示图片

package com.example.choosepictest;

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

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {

    public static final int TAKE_PHOTO = 1;

    public static final int CROP_PHOTO = 2;

    private Button takePhoto;

    private Button chooseFromAlbum;

    private ImageView picture;

    private Uri imageUri;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        takePhoto = (Button) findViewById(R.id.take_photo);
        chooseFromAlbum = (Button) findViewById(R.id.choose_from_album);
        picture = (ImageView) findViewById(R.id.picture);
        takePhoto.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                //把图片命名为output_image.jpg并保存在sd卡根目录
                File outputImage = new File(Environment.getExternalStorageDirectory(),
                        "output_image.jpg");
                try {
                    if (outputImage.exists()) {
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                //Uri对应outputImage唯一地址
                imageUri = Uri.fromFile(outputImage);
                //调用拍照活动
                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                //指定图片输出地址
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                //启动拍照活动
                startActivityForResult(intent, TAKE_PHOTO);
            }
        });
        chooseFromAlbum.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                File outputImage = new File(Environment.getExternalStorageDirectory(),
                        "output_image.jpg");
                try {
                    if (outputImage.exists()) {
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                imageUri = Uri.fromFile(outputImage);
                Intent intent = new Intent("android.intent.action.GET_CONTENT");
                intent.setType("image/*");
                intent.putExtra("crop", true);
                intent.putExtra("scale", true);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(intent, CROP_PHOTO);//启动裁剪活动
            }
        });
    }
    //结果返回,拍照和裁剪完返回
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
        //拍照完
        case TAKE_PHOTO:
            if (resultCode == RESULT_OK) {
                Intent intent = new Intent("com.android.camera.action.CROP");
                intent.setDataAndType(imageUri, "image/*");//设定图片类型
                intent.putExtra("scale", true);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//键:用于后面从Intent取值;要传递的数据
                startActivityForResult(intent, CROP_PHOTO);//启动裁剪程序
            }
            break;
        //裁剪完
        case CROP_PHOTO:
            if (resultCode == RESULT_OK) {
                try {
                    Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver()
                            .openInputStream(imageUri));
                    //显示image
                    picture.setImageBitmap(bitmap);
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }
            }
            break;
        default:
            break;
        }
    }

}

结果:

标签: android

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