我编写了以下代码,但是我确定在onItemClick()方法中做错了什么
我的列表视图显示正确,当单击另一个活动时,我只想在新活动中显示图像
所以需要你们的帮助
主要活动
public class MainActivity extends ActionBarActivity {
String[] days = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
"Saturday", "Sunday" };
int[] images = { R.drawable.ic_launcher, R.drawable.ic_launcher,
R.drawable.ic_launcher, R.drawable.ic_launcher,
R.drawable.ic_launcher, R.drawable.ic_launcher,
R.drawable.ic_launcher };
int[] images1 = { R.drawable.image01, R.drawable.image02,
R.drawable.image03, R.drawable.image04, R.drawable.image05,
R.drawable.image06, R.drawable.image07 };
ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.listView1);
ArjAdapter adapter = new ArjAdapter(getBaseContext(), days, images);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
File imgfile = new File("");
if (imgfile.exists()) {
String myBitmap = imgfile.getAbsolutePath();
Intent intent = new Intent(MainActivity.this,
ImageActivity.class);
intent.setType("image/*");
intent.putExtra("img", "images1");
startActivity(intent);
}
}
});
在上述方法中,我不确定文件对象内部应包含什么内容,我在某处看到了该方法,但不确定文件内部包含什么内容,因此请留空以咨询大家
ImageActivity,我要在其中显示图像
public class ImageActivity extends Activity {
ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.images);
Bitmap myBitmap = BitmapFactory.decodeFile(getIntent().getStringExtra(
"img"));
ImageView iv = (ImageView) findViewById(R.id.imageView2);
iv.setImageBitmap(myBitmap);
}
任何建议都欢迎
解决方法:
你应该这样写onListItemClick()
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(MainActivity.this,
ImageActivity.class);
intent.putExtra("img", images1[position]);
startActivity(intent);
}
});
ImageActivity.java
public class ImageActivity extends Activity {
ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.images);
ImageView iv = (ImageView) findViewById(R.id.imageView2);
iv.setImageResource(getIntent().getIntExtra("img", 0));
}
}
输出:
标签:android,listview 来源: https://codeday.me/bug/20191013/1906181.html
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