Android开发技巧汇总

1、全局获取Context

自定义Application

public class MyApplication extends Application {
private static Context context;
@Override
public void onCreate() {
context = getApplicationContext();
}
public static Context getContext() {
return context;
}
}

在清单文件中配置

<application
android:name="com.example.networktest.MyApplication"
…… >
……
</application>

获取Context

MyApplication.getContext()

2、在LogCat中打印活动名

Log.d("BaseActivity", getClass().getSimpleName());

3、随时退出程序

建立工具类，活动容器ActivityCollector

静态域：List类型的activities

静态方法：addActivity、removeActivity、finishAll

public static void finishAll() {
for (Activity activity : activities) {
if (!activity.isFinishing()) {
activity.finish();
}
}

建立Activity的基类BaseActivity

public class BaseActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("BaseActivity", getClass().getSimpleName());
ActivityCollector.addActivity(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityCollector.removeActivity(this);
}
}

4、启动活动快捷写法

目标Activity

public class SecondActivity extends BaseActivity {
public static void actionStart(Context context, String data1, String data2) {
Intent intent = new Intent(context, SecondActivity.class);
intent.putExtra("param1", data1);
intent.putExtra("param2", data2);
context.startActivity(intent);
}
……
}

启动目标Activity

SecondActivity.actionStart(FirstActivity.this, "data1", "data2");

5、