Android开发技巧汇总

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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、

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