Android單擊通知欄後返回正在執行的程式並跳轉到指定fragment頁面
阿新 • • 發佈:2019-01-11
今天寫通知欄的時候遇到了這樣的一個問題:在fragment中傳送通知,點選通知後跳轉到指定的fragment。
第一思路就是建立一個通知,點選通知後啟動activity,在activity接受傳入過來的值來判斷啟動那個fragment。
既然有思路了,就開始寫吧。程式碼如下:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width ="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fragment_index"/>
</LinearLayout>
MainActivity.class:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_index,new NotifyFragment()).commit();
}
@Override
protected void onResume() {
Intent intent = getIntent();
String value = intent.getStringExtra("toValue");
Log.i("TAG", "onResume: " + value);
if(!TextUtils.isEmpty(value)) {
switch (value) {
case "href":
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_index, new HrefFragment()).commit();
break;
}
}
super.onResume();
}
}
NotifyFragment.class:
public class NotifyFragment extends Fragment {
private View view;
private Button btnNotify;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle
savedInstanceState) {
view = inflater.inflate(R.layout.fragment_content,container,false);
btnNotify = (Button) view.findViewById(R.id.btn_notify);
btnNotify.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
Intent intent = new Intent(getContext(),MainActivity.class);
intent.putExtra("toValue","href");
PendingIntent pend = PendingIntent.getActivity(getContext(),201,intent,PendingIntent.FLAG_UPDATE_CURRENT);
Notification notify = new Notification.Builder(getContext())
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("這是標題")
.setContentText("這是內容")
.setContentIntent(pend)
.build();
notify.flags = Notification.FLAG_AUTO_CANCEL;
NotificationManager manager = (NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(1,notify);
}
}
});
return view;
}
}
fragment_notify.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btn_notify"
android:textSize="16sp"
android:text="傳送通知"
/>
</LinearLayout>
跳轉後的fragment
public class HrefFragment extends Fragment{
private View view;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle
savedInstanceState) {
view = inflater.inflate(R.layout.fragment_href,container,false);
return view;
}
}
xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/text_href"
android:textSize="20sp"
android:text="跳轉後的介面"
android:gravity="center"
/>
</LinearLayout>
執行結果:
05-27 00:15:38.040 17430-17430/com.example.administrator.notifydemo I/TAG: onResume: href
成功接受到結果,頁面也跳轉了,但是單擊返回鍵的時候會返回上個activity。正常的思路應該是在當前程式裡點選通知直接跳轉到指定fragment上,這樣寫不符合要求。想了下,是不是沒有設定flag的原因?
結合網上資料後代碼如下:
btnNotify.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
//Intent intent = new Intent(getContext(),MainActivity.class);
//判斷當前activity是否建立
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.putExtra("toValue","href");
//====增加部分
intent.addCategory(Intent.CATEGORY_LAUNCHER);
intent.setComponent(new ComponentName(getContext(), MainActivity.class));
intent.setFlags( Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
PendingIntent pend = PendingIntent.getActivity(getContext(),201,intent,PendingIntent.FLAG_UPDATE_CURRENT);
Notification notify = new Notification.Builder(getContext())
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("這是標題")
.setContentText("這是內容")
.setContentIntent(pend)
.build();
notify.flags = Notification.FLAG_AUTO_CANCEL;
NotificationManager manager = (NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(1,notify);
}
}
});
執行效果如下:
但是這樣又出現一個問題:在軟體介面上點選是沒有問題,但是無法接受到傳過來的引數,退出去後點通知能夠接受到引數。也就是說onResume()方法沒有被執行。
<activity android:name=".MainActivity"
android:launchMode="singleTask">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
當使用Intent來啟動Activity時會呼叫onNewIntent()方法。
MainActivity:
@Override
protected void onResume() {
//退出應用後點擊通知欄進去是進行這個方法
getNotify(getIntent());
super.onResume();
}
@Override
protected void onNewIntent(Intent intent) {
//在應用上點選通知欄進去是執行這個方法
getNotify(intent);
setIntent(intent);
}
private void getNotify(Intent intent){
String value = intent.getStringExtra("toValue");
Log.i("TAG", "onNewIntent: " + value);
if(!TextUtils.isEmpty(value)) {
switch (value) {
case "href":
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_index, new HrefFragment()).commitAllowingStateLoss();
//這裡不是用的commit提交,用的commitAllowingStateLoss方式。commit不允許後臺執行,不然會報Deferring update until onResume 錯誤
break;
}
}
super.onNewIntent(intent);
}
NotifyFragment的Intent修改如下
Intent intent = new Intent(getContext(),MainActivity.class);
intent.putExtra("toValue","href");
最後執行情況:
ok,三種開啟方式都能進入進入頁面。問題解決。