java.lang.IllegalArgumentException： width and height 必须> 0

Question

我正试图从图库中打开一个图像，并在其上放置一个随机矩形。但当我单击按钮打开图库时，会发生以下异常。

java.lang.IollegalArgumentException：宽度和高度必须大于0

public class MainActivity extends Activity implements OnClickListener {
 TextView textView;
 ImageView image1;
Button get_image, save_image, read_image;
 String selectedImagePath;
int SELECT_PICTURE = 1;
String DB_NAME =  "test.db";
String TABLE_NAME = "mytable";
String pts_table="ptstable";
Bitmap bmp;
Intent intent;
Canvas cnvs;
Uri selectedImageUri;
Random r;
int x,y;
Paint paint;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    r=new Random();
    image1 = (ImageView) findViewById(R.id.imageView1);
    //image2 = (ImageView) findViewById(R.id.imageView2);
    textView = (TextView) findViewById(R.id.textView1);
    get_image = (Button) findViewById(R.id.get_image);
    get_image.setOnClickListener(this);
    save_image = (Button) findViewById(R.id.save_image);
    save_image.setOnClickListener(this);
    read_image = (Button) findViewById(R.id.read_image);
    read_image.setOnClickListener(this);
}
public void onClick(View v) {
    int id = v.getId();
    switch (id) {
    case R.id.get_image:
        intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(
                Intent.createChooser(intent, "Select Picture"),
         SELECT_PICTURE);
        break;
    }
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_PICTURE && data!=null) {
            selectedImageUri = data.getData();
            selectedImagePath = getPath(selectedImageUri);
            System.out.println("Image Path : " + selectedImagePath);
            bmp=Bitmap.createBitmap(image1.getHeight(),image1.getWidth(),Bitmap.Config.RGB_565);
            cnvs=new Canvas(bmp);
            paint=new Paint();
            paint.setColor(Color.RED);
            cnvs.drawBitmap(BitmapFactory.decodeFile(selectedImagePath), 0,0,null);
            cnvs.drawRect(50, 50, 100, 100, paint);
            image1.setImageBitmap(bmp);
            //image1.setImageURI(selectedImageUri);
        }
    }
}
@SuppressWarnings("deprecation")
public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor
            .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
} 

}

这发生在的onActivityResult（）内部

bmp=Bitmap.createBitmap(img.getHeight(),img.getWidth(),Bitmap.Config.RGB_565); 

有人能帮帮我吗？提前感谢

Answer 1

我认为您只需要添加一些防御代码来检查返回数据是否可用于下一步操作，但不要立即使用。

不知怎的，由于android设备的不同，返回的数据在你的脑海中并不总是正确的。

Answer 2

使用此：

Uri selectedImageUri = data.getData();
String tempPath = getPath(selectedImageUri, getActivity());
Bitmap bm;
BitmapFactory.Options btmapOptions = new BitmapFactory.Options();
bm = BitmapFactory.decodeFile(tempPath, btmapOptions);
img.setImageBitmap(bm);
uploadImagePath = tempPath;

希望这对你有帮助。。