如何将位图图像传输到另一个活动？

Question

为什么我的代码不起作用？我想将图像从一项活动转移到另一项活动。请帮忙！注意：我已经创建了一个相机功能，这就是我获取图像的地方。

这是 MainActivity.java

public class MainActivity extends AppCompatActivity {

public static final int CAMERA_REQUEST = 9999;

ImageView imageView1;
Button camera,send;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imageView1 = findViewById(R.id.imageView1);
    camera = findViewById(R.id.camera);
    send = findViewById(R.id.send);

    camera.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent d1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(d1, CAMERA_REQUEST);
        }
    });

    send.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            imageView1.buildDrawingCache();
            Bitmap bitmap = imageView1.getDrawingCache();

            Intent intent = new Intent(MainActivity.this, ResultActivity.class);  
            intent.putExtra("bp", bitmap);

        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Bitmap bitmap = (Bitmap) data.getExtras().get("data");
    imageView1.setImageBitmap(bitmap);
}
}

这是ResultActivity.java

public class ResultActivity extends AppCompatActivity {

ImageView imageView2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_result);

    imageView2 = findViewById(R.id.imageView2);

    Intent intent = new Intent();
    Bitmap bitmap = intent.getParcelableExtra("bp");
    imageView2.setImageBitmap(bitmap);
    }
}  

如果我做错了什么。请告诉我。谢谢

Answer 1

您已经在“OnActivityResult”中收到的意图中以 Uri 形式接收位图。 您所要做的就是使用此意图移动到第二个活动。 然后从那里您可以将其转换为位图：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Intent intent = new Intent(MainActivity.this, ResultActivity.class);  
    intent.putExtra("Some key",data.getData().toString());
    Bitmap bitmap = (Bitmap) data.getExtras().get("data");
    imageView1.setImageBitmap(bitmap);
}
}

在 ResultActivity 上：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_result);
    Uri uri = Uri.parse(getIntent.getExtra.getString("Some key"));
    imageView2 = findViewById(R.id.imageView2);
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);

    imageView2.setImageBitmap(bitmap);
    }
}