android how to hide the status bar without hiding

问题:

In my application i am working with canvas. I am drawing on canvas. I put canvas color as white. When my app open the canvas is visible along with above status bar. But i want my canvas should take the full screen. means that Notification status bar should disapear when i run that app bt not the title bar(bcz i m using some custom title bar) How can i do that?

By using below code i gave custom title,

requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);

Now i am trying to hide status bar using below code in activity-

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);

and in AndroidManifest.xml

android:theme="@android:style/Theme.NoTitleBar.Fullscreen"

But it shows force close. Give me a way how to do that?

回答1:

You can't use Window.FEATURE_CUSTOM_TITLE after setting Theme.NoTitleBar. It's enough to use just this theme. Do not set all these flags in code.

EDIT: Seems I misunderstood your question. I read it again carefully and now I see you're asking about Android 2.x and its notification bar. Your onCreate() method should look like this:

public void onCreate(final Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

    setContentView(R.layout.name);

    getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
}

You mustn't set Theme.NoTitleBar or Theme.NoTitleBar.Fullscreen for this activity. Just use the default Theme or don't specify any theme at all.

回答2:

It's enough to remove the line

 requestWindowFeature(Window.FEATURE_NO_TITLE);

But if you want to display full screen (without action bar) write too

 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
    WindowManager.LayoutParams.FLAG_FULLSCREEN);


  setContentView(R.layout.activity_location_eb);

回答3:

Am going to tell you how to tackle the title bar and the system notification panel individually and perfectly. Use one or both as per Your Need.

1.Do not apply any theme to the Activity through XML.

2.Now, go the corr. Java file and add these lines inside onCreate().. after super.onCreate()..

Part.a. to remove just Title Bar

this.requestWindowFeature(Window.FEATURE_NO_TITLE);

Part.b. to remove the System notification panel

this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

Do not forget to follow them with the usual

setContentView(R.layout.activity_layout_name);