Question

我有一个活动（主要活动），在这个活动中我有两个布局，一个布局为三个文本框，另一个为按钮，当我点击按钮布局成功转换为位图并保存在SD卡，但我不知道这个保存的布局位图如何在ONCreate Mathod中重新进入其他活动。请帮帮我，我是android的新手

这是我的第一个活动

    Bitmap b;
    TextView textView,textView1,textView2;
    ImageView imageView;
    LinearLayout view;
    Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView) findViewById(R.id.img);
        view = (LinearLayout) findViewById(R.id.ll);

        textView = (TextView) findViewById(R.id.tv1);
        textView1 = (TextView) findViewById(R.id.tv2);
        textView2 = (TextView) findViewById(R.id.tv3);
        button = (Button) findViewById(R.id.btn);

        button.setOnClickListener(new View.OnClickListener() {
            public  final String TAG =null ;

            @Override
            public void onClick(View v) {
                view.setDrawingCacheEnabled(true);
                view.buildDrawingCache();
                b = view.getDrawingCache();
                Intent data = null;
                imageView.setImageBitmap(b);
                String root = Environment.getExternalStorageDirectory()
                        .toString();

                File myDir = new File(root + "/_images");
                myDir.mkdirs();
                Random generator = new Random();
                int n = 10000;
                n = generator.nextInt(n);
                String fname = "Image-" + n + ".jpg";
                File file = new File(myDir, fname);

                Intent intent=new Intent(MainActivity.this,Main2Activity.class);
                startActivity(intent);
                Log.i(TAG, "" + file);

                if (file.exists())
                    file.delete();
                try {
                    FileOutputStream out = new FileOutputStream(file);
                    b.compress(Bitmap.CompressFormat.JPEG, 90, out);
                    out.flush();
                    out.close();

                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
        });

    }
}

现在这个保存的图像将如何重新进入第二个活动

public class Main2Activity extends AppCompatActivity {

    ImageView imageView1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);


        ImageView mImgView = (ImageView)findViewById(R.id.img1);

    }


}

Answer 1

通过intent extra as string将第一个活动的路径发送到第二个活动。在第二个活动中获取它通过

将其转换为文件

File imgFilePath = new  File(imgStringPath);

然后将其转换为位图并将其设置为像这样的

Bitmap myBitmap = BitmapFactory.decodeFile(imgFilePath.getAbsolutePath());
ImageView mImgView = (ImageView)findViewById(R.id.img1);
profilePic3.setImageBitmap(myBitmap);

如何将布局位图图像反转为第二个活动

1 个答案: