我正在创建画廊。我有显示所有图像的网格布局。现在我想这样做,当我们选择一个图像时,另一个意图将启动,我已经完成了,但现在我想在这个新意图中显示选定的图像。
提前谢谢。
我正在创建画廊。我有显示所有图像的网格布局。现在我想这样做,当我们选择一个图像时,另一个意图将启动,我已经完成了,但现在我想在这个新意图中显示选定的图像。
提前谢谢。
请使用下面的gridview代码。
主要的.xml
<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="90dp"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center" />
ImageAdapter.java
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(Constants.mThumbIds[position]);
return imageView;
}
}
常量.java
public class Constants {
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7
};
}
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intentt mInDisplay=new Intent(MainActivity.this, DisplayActivity.class);
mInDisplay.putExtra("Index", position);
startActivity(mInDisplay);
}
});
}
}
显示.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/mImgView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
显示活动.java
public class DisplayActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Bundle bdl=getIntent().getExtras();
int index=bdl.getInt("Index");
ImageView mImage = (ImageView) findViewById(R.id.mImgView1);
mImage.setImageResource(Constants.mThumbIds[index]);
}
}
并将这两个活动声明到您的 android 清单文件中。
您可以通过setOnClickListener在每个图像上设置一个点击监听器,然后监听器可以发送启动新活动的意图。
我们还想发送带有意图的图像路径。为了实现这一点,您可以在您的意图上使用putExtra ,您选择的名称作为第一个参数,图像路径作为第二个参数。
然后,您应该能够通过在新活动中使用getStringExtra来检索图像路径。您需要通过在活动中调用 getIntent() 来获取意图
祝你好运