Android单击通知栏后返回正在运行的程序并跳转到指定fragment页面

今天写通知栏的时候遇到了这样的一个问题:在fragment中发送通知,点击通知后跳转到指定的fragment。

第一思路就是创建一个通知,点击通知后启动activity,在activity接受传入过来的值来判断启动那个fragment。

既然有思路了,就开始写吧。代码如下:

activity_main.xml:


<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("这是标题")
                            .setContentText("这是内容")
                            .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:


<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="发送通知"
        />

LinearLayout>

跳转后的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:


<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="跳转后的界面"
        android:gravity="center"
        />
LinearLayout>

运行结果:

05-27 00:15:38.040 17430-17430/com.example.administrator.notifydemo I/TAG: onResume: href

Android单击通知栏后返回正在运行的程序并跳转到指定fragment页面_第1张图片
成功接受到结果,页面也跳转了,但是单击返回键的时候会返回上个activity。正常的思路应该是在当前程序里点击通知直接跳转到指定fragment上,这样写不符合要求。想了下,是不是没有设置flag的原因?
结合网上资料后代码如下:

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);
                    //判断当前activity是否创建
                    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("这是标题")
                            .setContentText("这是内容")
                            .setContentIntent(pend)
                            .build();

                    notify.flags = Notification.FLAG_AUTO_CANCEL;

                    NotificationManager manager = (NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);

                    manager.notify(1,notify);

                }

            }
        });

运行效果如下:
Android单击通知栏后返回正在运行的程序并跳转到指定fragment页面_第2张图片
但是这样又出现一个问题:在软件界面上点击是没有问题,但是无法接受到传过来的参数,退出去后点通知能够接受到参数。也就是说onResume()方法没有被执行。

在网上看到这篇文章:http://blog.csdn.net/nihaoqiulinhe/article/details/50697301
通过设置Activity启动模式解决。上代码:
manifest文件添加 android:launchMode=”singleTask”

 <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>

当使用Intent来启动Activity时会调用onNewIntent()方法。
MainActivity:

    @Override
    protected void onResume() {
        //退出应用后点击通知栏进去是进行这个方法
        getNotify(getIntent());
        super.onResume();
    }

    @Override
    protected void onNewIntent(Intent intent) {
        //在应用上点击通知栏进去是执行这个方法
        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();
                    //这里不是用的commit提交,用的commitAllowingStateLoss方式。commit不允许后台执行,不然会报Deferring update until onResume 错误
                    break;
            }
        }
        super.onNewIntent(intent);
    }

NotifyFragment的Intent修改如下

Intent intent = new Intent(getContext(),MainActivity.class);
intent.putExtra("toValue","href");

最后运行情况:

ok,三种打开方式都能进入进入页面。问题解决。

完整代码下载:
https://github.com/HOBERHUNTER/NotifyStartIntentDemo

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