调用相机相册

最新推荐文章于 2022-07-07 09:23:39 发布

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最新推荐文章于 2022-07-07 09:23:39 发布

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本文介绍了一个Android应用中实现图片选择和相机拍摄功能的方法。通过使用Intent启动系统相册选择图片，并通过ACTION_IMAGE_CAPTURE启动相机拍摄照片。文章还展示了如何处理返回的图片路径并在ImageView中显示。




public class MainActivity extends AppCompatActivity {

    String path;
    private ImageView imageView;
    private static final String TAG = "MainActivity";
    private static final int IMAGE = 1;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        path = getPath() + "/image.png";
        imageView = findViewById(R.id.main_image);
        button = findViewById(R.id.main_but);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, 2);
            }
        });

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                Uri uri = Uri.fromFile(new File(path));
                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                startActivityForResult(intent, IMAGE);
            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 2 && resultCode == Activity.RESULT_OK && data != null) {
            Uri selectedImage = data.getData();
            String[] filePathColumns={MediaStore.Images.Media.DATA};
            Cursor c = getContentResolver().query(selectedImage, filePathColumns, null, null, null);
            c.moveToFirst();
            int columnIndex = c.getColumnIndex(filePathColumns[0]);
            String imagePath = c.getString(columnIndex);
            showImage(imagePath);
            c.close();


        }
        if (requestCode == IMAGE && resultCode == Activity.RESULT_OK) {
            showImage(path);
        }
    }

    private void showImage(String path) {
        Bitmap bitmap = BitmapFactory.decodeFile(path);
        ((ImageView) findViewById(R.id.main_image)).setImageBitmap(bitmap);
    }

    public String getPath() {
        File file = new File(Environment.getExternalStorageDirectory().getPath() + "/myh");
        if (!file.exists() || !file.isDirectory()) {
            file.mkdirs();
        }
        return file.getPath();
    }


}