Android代码笔记

来源：互联网发布：淘宝牛肉干怎么上传编辑：程序博客网时间：2024/06/04 23:12

返回数据给上一个Activity

FirstActivity：

Intent Intent = new Intent(FirstAcitivty.this, SecondActivity.class);startActivityForResult(intent, 1);

SecondActivity:

Intent intent = new Intent();intent.putExtra(“date”,”hello world!”);setResult(RESULT_OK, intent);

FirstAcitvity:

@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case 1: if (resultCode == RESULT_OK) { String returnedData = data.getStringExtra("data_return"); Log.d("FirstActivity", returnedData); } break; default:} }

调用系统拨号

Intent intent = new Intent(Intent.ACTION_DIAL); intent.setData(Uri.parse("tel:10086")); startActivity(intent);

Activity启动模式

AndroidManifest.xml

<activityandroid:launchMode = “standard”   //默认启动模式//singleTop    //处于栈顶的Activity启动模式是singleTop，不会再次创建实例//singleTask   //查看栈中有是否有Activity实例，如果有不会再次创建实例//singleInstance  //被设定为这种模式的Activity将存在于新的返回栈中></activity>

统一退出所有Activity的类

public class ActivityCollector {public static List<Activity> activities = new ArrayList<Activity>(); public static void addActivity(Activity activity) { activities.add(activity); } public static void removeActivity(Activity activity) { activities.remove(activity); } public static void finishAll() { for (Activity activity : activities) { if (!activity.isFinishing()) { activity.finish(); } } } }

比较好的传递数据的代码习惯

接收数据的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);}}

发送数据的activity类

button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {SecondActivity.actionStart(FirstActivity.this, "data1", "data2");}});

自定义标题栏控件

public class TitleLayout extends LinearLayout {public TitleLayout(Context context, AttributeSet attrs) {super(context, attrs);LayoutInflater.from(context).inflate(R.layout.title, this);//找控件  设置监听} }

0 0