LayoutInflater的使用,在实际开发种LayoutInflater这个类还是非常有用的,它的作用类似于 findViewById(),不同点是LayoutInflater是用来找layout下xml布局文件,并且实例化!而findViewById()是找具体xml下的具体 widget控件(如:Button,TextView等)。
public class LayoutInflaterDemo extends Activity implements OnClickListener { private Button button; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button = (Button)findViewById(R.id.button); button.setOnClickListener(this); } @Override public void onClick(View v) { showCustomDialog(); } public void showCustomDialog() { AlertDialog.Builder builder; AlertDialog alertDialog; Context mContext = LayoutInflaterDemo.this; //下面俩种方法都可以 ////LayoutInflater inflater = getLayoutInflater(); LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE); View layout = inflater.inflate(R.layout.custom_dialog,null); TextView text = (TextView) layout.findViewById(R.id.text); text.setText("Hello, Welcome to Mr Wei's blog!"); ImageView image = (ImageView) layout.findViewById(R.id.image); image.setImageResource(R.drawable.icon); builder = new AlertDialog.Builder(mContext); builder.setView(layout); alertDialog = builder.create(); alertDialog.show(); } }