android多媒體——5步學會使用系統相機

使用系統相機拍照並返回照片步驟如下
【1】權限

【2】通過intent啟動相機

  Intent intent = new Intent();
                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//隱式啟動系統相機

【3】設置圖片保存位置及名稱

 file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + .jpg);//新建相機圖片保存位置，圖片名稱

                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                ////告知相機圖片保存位置

                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));

【4】啟動相機

 startActivityForResult(intent, 0x23);

【5】得到相片
將相片設置在ImageView上面

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //data包含縮略圖
        if (requestCode == 0x23) {
            if (resultCode == RESULT_OK) {
                imageView.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
                //imageView.setImageURI(Uri.fromFile(file));//得到圖片


            }
        }


    }

程序源碼

public class MainActivity extends Activity {
    private Button button;
    private ImageView imageView;
    private File file;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button);
        imageView = (ImageView) findViewById(R.id.imageview);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent();
                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//隱式啟動系統相機
                file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + .jpg);//新建相機圖片保存位置，圖片名稱

                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                ////告知相機圖片保存位置

                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
                startActivityForResult(intent, 0x23);

            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //data縮略圖
        if (requestCode == 0x23) {
            if (resultCode == RESULT_OK) {
                imageView.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
                //imageView.setImageURI(Uri.fromFile(file));//得到圖片

                data.getIntExtra(MediaStore.EXTRA_OUTPUT,0);


            }
        }


    }
}