http://code.google.com/p/roboguice/
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如果用过大名鼎鼎的Spring(轻量级的J2EE框架),就会知道Spring的核心思想就是“依赖注入”。
Google贡献了一个开源项目,用于在Android上使用依赖注入机制。
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一个Android activity的典型代码如下:
class AndroidWay extends Activity { TextView name; ImageView thumbnail; LocationManager loc; Drawable icon; String myName; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); name = (TextView) findViewById(R.id.name); thumbnail = (ImageView) findViewById(R.id.thumbnail); loc = (LocationManager) getSystemService(Activity.LOCATION_SERVICE); icon = getResources().getDrawable(R.drawable.icon); myName = getString(R.string.app_name); name.setText( "Hello, " + myName ); } }
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如果使用RoboGuice,代码就会变得非常简洁:
class RoboWay extends RoboActivity { @InjectView(R.id.name) TextView name; @InjectView(R.id.thumbnail) ImageView thumbnail; @InjectResource(R.drawable.icon) Drawable icon; @InjectResource(R.string.app_name) String myName; @Inject LocationManager loc; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); name.setText( "Hello, " + myName ); } }
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所以,如果大家要从头开发一个崭新的程序的话,可以考虑使用这些前卫的技术。