如何在GridView中设置图像显示中的TextView在Android中

Question

Hello EveryOne !! 我已经在gridview中显示图像。现在点击从gridview中的任何图像我正在导航到屏幕上显示的点击图像的下一页。根据我的需要，我必须添加图像的描述在全屏我采取了一个TextView但它不是happening.Here是我的代码...

FullImage.java

public class FullImage extends Activity { 
private TextView lView = null; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.full); 

    // get intent data 
    Intent i = getIntent(); 

    // Selected image id 
    int position = i.getExtras().getInt("id"); 

    if (position == 1){ 
     lView = (TextView)findViewById(R.id.my_title); 
     lView.setText("Akshardham"); 

    } 
    else{ 
     lView = (TextView)findViewById(R.id.my_title); 
     lView.setText("Other"); 

    } 



    ImageAdapter imageAdapter = new ImageAdapter(this); 

    ImageView imageView = (ImageView) findViewById(R.id.full_image_view); 
    imageView.setImageResource(imageAdapter.mThumbIds[position]); 
} 

而且Full.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical" > 

<ImageView android:id="@+id/full_image_view" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent"/> 

<TextView 
android:id="@+id/my_title" 
android:layout_height="wrap_content" 
android:layout_width="wrap_content" 
android:layout_centerVertical="true" 
android:layout_marginLeft="5dip"/> 

这里是我的MainActivity类别代码..

gridView.setOnItemClickListener(new OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View v, 
       int position, long id) { 

      // Sending image id to FullScreenActivity 
      Intent i = new Intent(getApplicationContext(), FullImage.class); 
      // passing array index 
      i.putExtra("id", position); 
      startActivity(i); 
     } 
    }); 
} 

，这里是我的ImageAdapter代码...

public class ImageAdapter extends BaseAdapter { 
private Context mContext; 

// Keep all Images in array 
public Integer[] mThumbIds = { 
     R.drawable.akshar, R.drawable.charminar, 
     R.drawable.gateway, R.drawable.goa, 
     R.drawable.jimcorbet, R.drawable.kerala, 
     R.drawable.mussoorie, R.drawable.parliament, 
     R.drawable.qutub, R.drawable.taj, 
     R.drawable.tirupati 

}; 

// Constructor 
public ImageAdapter(Context c){ 
    mContext = c; 
} 

@Override 
public int getCount() { 
    return mThumbIds.length; 
} 

@Override 
public Object getItem(int position) { 
    return mThumbIds[position]; 
} 

@Override 
public long getItemId(int position) { 
    return 0; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    ImageView imageView = new ImageView(mContext); 
    imageView.setImageResource(mThumbIds[position]); 
    imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
    imageView.setLayoutParams(new GridView.LayoutParams(270, 270)); 
    return imageView; 
} 

}

Answer 1

这里ImageView的就是填写家长的高度和宽度，以便它会占用屏幕上的所有空间。所以你需要设计你的布局，这样就显示了这两个元素的顺序。

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical"> 

    <ImageView 
     android:id="@+id/full_image_view" 
     android:layout_width="fill_parent" 
     android:src="@drawable/button" 
     android:layout_height="wrap_content" /> 

    <TextView 
     android:id="@+id/my_title" 
     android:layout_centerHorizontal="true" 
     android:layout_below="@+id/full_image_view" 
     android:layout_height="wrap_content" 
     android:text="This is the image which i want at bottom" 
     android:layout_width="wrap_content" 
     android:layout_marginLeft="5dip" /> 
</RelativeLayout>