Android5.0开发范例大全 读书笔记（六），android5.0范例

Android5.0开发范例大全 读书笔记（六），android5.0范例

（六）与系统交互

6.1后台通知

1.关于后台通知，下面展示6种样式。值得一提的是，笔者的小米5只能显示基本样式，雷军真是良心厂商啊。

2.首先上布局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"
>

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:id="@+id/options_group">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Rich Styles"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_basic"
            android:text="Basic Notification"
            android:checked="true"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_bigtext"
            android:text="BigText Style"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_bigpicture"
            android:text="BigPicture Style"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_inbox"
            android:text="Inbox Style"
            />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:text="Secured Styles"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_private"
            android:text="Public Version LockScreen" />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_secret"
            android:text="Secret LockScreen" />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/option_headsup"
            android:text="Heads-Up Notification" />
    </RadioGroup>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Post a Notification"
        android:onClick="onPostClick"/>
</LinearLayout>

3.接着是完整代码

ublic class NotificationActivity extends AppCompatActivity {
    private RadioGroup mOptionsGroup;
    private static Handler mHandle = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_notification);
        mOptionsGroup = (RadioGroup) findViewById(R.id.options_group);

    }

    public void onPostClick(View view) {
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        final int noteId = mOptionsGroup.getCheckedRadioButtonId();
        Notification note = null;
        switch (noteId) {
            case R.id.option_basic:
            case R.id.option_bigtext:
            case R.id.option_bigpicture:
            case R.id.option_inbox:
                note = buildStyledNotification(noteId);
                break;
            case R.id.option_private:
            case R.id.option_secret:
            case R.id.option_headsup:

                note = buildSecuredNotification(noteId);
                break;
        }
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        manager.notify(noteId, note);
    }

    private Notification buildStyledNotification(int type) {
        Intent launchIntent = new Intent(this, NotificationActivity.class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, launchIntent, 0);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(NotificationActivity.this);
        builder.setSmallIcon(R.mipmap.ic_launcher)
                .setTicker("something happen")
                .setWhen(System.currentTimeMillis())
                .setAutoCancel(true)
                .setDefaults(Notification.DEFAULT_SOUND)
                .setContentTitle("we are finished")
                .setContentText("click here")
                .setContentIntent(contentIntent)