Question

        Integer[] leftItems = new Integer[]{R.drawable.ic_1, R.drawable.ic_2, R.drawable.ic_3, R.drawable.ic_4, R.drawable.ic_5};
        Integer[] rightItems = new Integer[]{R.drawable.ic_6, R.drawable.ic_7, R.drawable.ic_8, R.drawable.ic_9, R.drawable.ic_10};

        leftAdapter = new ItemsAdapter(this, R.layout.item, leftItems);
        rightAdapter = new ItemsAdapter(this, R.layout.item, rightItems);
        listViewLeft.setAdapter(leftAdapter);
        listViewRight.setAdapter(rightAdapter);

        leftViewsHeights = new int[leftItems.length];
        rightViewsHeights = new int[rightItems.length];

对于左侧列表视图onclick我使用下面的代码

listViewLeft.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {

            // TODO Auto-generated method stub
            Integer name = (Integer) arg0.getItemAtPosition(arg2);
            Intent Courses = new Intent(ItemsActivity.this, ViewMyImage.class);
            Courses.putExtra("position",arg2);
            Courses.putExtra("name",name.toString());
            startActivity(Courses);

        }

    });

在ViewMyImage.java中，我使用此代码获取值

int value = getIntent().getExtras().getInt("position");
        String name = getIntent().getExtras().getString("name");
        Toast.makeText(getApplicationContext(), name,Toast.LENGTH_LONG).show();

我想要图像的值ic_X，我可以再次显示图像。

Answer 1

使用getResources().getIdentifier尝试从字符串名称中找到drawable：

int value = getIntent().getExtras().getInt("position");
int drawableid = getResources().getIdentifier("ic_"+value , 
                                                 "drawable", getPackageName());
Drawable drawableimg = getResources().getDrawable(drawableid);

现在使用drawableimg使用ImageView.setImageDrawable

设置ImageView背景图片

并且发送方式是传递Drawable id，而不是使用ViewMyImage从上一个Activity到Courses.putExtra("position",leftItems[arg2]) Activity的位置。在第二个Activity中，您可以直接将值传递给setImageDrawable id

将图像列表视图的值传递给另一个活动

1 个答案: