从GridView中选择图像和其他意图显示它(Select image from gridview

我创建画廊。我已经网格布局，其显示的所有图像。现在我想做的事情，当我们选择一个图像，然后另一个意图将开始，我已经做到了，但现在我想在这个新的意图，显示所选图像。

thanx提前。

Answer 1:

请使用下面的GridView的代码。

main.xml中

<?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;
    }
}

Constants.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);
            }
        });
    }
}

display.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>

DisplayActivity.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]);
    }
}

并宣布活动都在您的Android清单文件。

Answer 2:

您可以通过设置每张图片上点击收听setOnClickListener ，听众可以发送意图开始新的活动。

我们也希望，意图发送图像路径。要做到这一点，您可以使用putExtra你的意图与您选择的第一个参数和第二个参数图像路径的名称。

然后，您应该能够通过使用以检索图像路径getStringExtra在您的新活动。您需要在您的活动呼吁getIntent（）来获得意图

祝好运