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872天前import android.app.Activity; |
import android.os.Bundle; |
import android.view.View; |
import android.widget.AdapterView; |
import android.widget.ArrayAdapter; |
import android.widget.Button; |
import android.widget.GridView; |
import android.widget.TextView; |
/** |
* GridView 实例 |
*/ |
public class EX04_18 extends Activity { |
private TextView mTextView01; |
private Button mButton01, mButton02; |
private GridView mGridView01; |
private String[] mGames1, mGames2; |
private ArrayAdapter aryAdapter1; |
@Override |
public void onCreate(Bundle savedInstanceState) { |
super.onCreate(savedInstanceState); |
setContentView(R.layout.main); |
/* 4个字符串数组 */ |
mGames1 = new String[] { getResources().getString(R.string.str_list1), |
getResources().getString(R.string.str_list2), |
getResources().getString(R.string.str_list3), |
getResources().getString(R.string.str_list4) }; |
/* 9个字符串数组 */ |
mGames2 = new String[] { getResources().getString(R.string.str_list1), |
getResources().getString(R.string.str_list2), |
getResources().getString(R.string.str_list3), |
getResources().getString(R.string.str_list4), |
getResources().getString(R.string.str_list1), |
getResources().getString(R.string.str_list2), |
getResources().getString(R.string.str_list3), |
getResources().getString(R.string.str_list4), |
getResources().getString(R.string.str_list1) }; |
mButton01 = (Button) findViewById(R.id.myButton1); |
mButton02 = (Button) findViewById(R.id.myButton2); |
mGridView01 = (GridView) findViewById(R.id.myGridView1); |
mTextView01 = (TextView) findViewById(R.id.myTextView1); |
mButton01.setOnClickListener(new Button.OnClickListener() { |
@Override |
public void onClick(View v) { |
// TODO Auto-generated method stub |
/* 4个元素，以2栏方式呈现(2x2) */ |
mGridView01.setNumColumns(2); |
aryAdapter1 = new ArrayAdapter(EX04_18.this, |
R.layout.simple_list_item_1_small, mGames1); |
mGridView01.setAdapter(aryAdapter1); |
// mGridView01.setScrollBarStyle(DEFAULT_KEYS_DIALER); |
mGridView01.setSelection(2); |
mGridView01.refreshDrawableState(); |
} |
}); |
mButton02.setOnClickListener(new Button.OnClickListener() { |
@Override |
public void onClick(View v) { |
// TODO Auto-generated method stub |
/* 9个元素，以3栏方式呈现(3x3) */ |
mGridView01.setNumColumns(3); |
aryAdapter1 = new ArrayAdapter(EX04_18.this, |
R.layout.simple_list_item_1_small, mGames2); |
mGridView01.setAdapter(aryAdapter1); |
} |
}); |
mGridView01.setOnItemClickListener(new GridView.OnItemClickListener() { |
@Override |
public void onItemClick(AdapterView parent, View v, int position, |
long arg3) { |
// TODO Auto-generated method stub |
/* 判断Adapter里的元素个数，判断被点选的是第几个元素名称 */ |
switch (aryAdapter1.getCount()) { |
case 4: |
/* position为GridView里的元素索引值 */ |
mTextView01.setText(mGames1[position]); |
break; |
case 9: |
mTextView01.setText(mGames2[position]); |
break; |
} |
} |
}); |
} |
} |
