Java-Android Learning (Day 5)

Java-Android Learning (Day 5)
Android layout picking + page Jump 1. Android layout picking

In the past two days, we will supplement the interface layout (which may be supplemented in the future ):

A) ScrollView

ScrollView refers to the view that needs to be displayed through the scroll axis when there is a lot of content and the screen is not fully displayed; ScrollView only supports vertical scrolling;

This view is a good choice for a large number of bar-level columns.

B) View

If we want to divide a region into different sub-regions, and there is an obvious split between regions (either a split line or a highly split area ),

Use It is a good choice. The example is as follows:

Android: layout_width = "fill_parent"
Android: layout_height = "20sp" // sets the height, indicating the height of the grayscale area. When the value is set to 1sp, the line character is displayed, with a separator effect.
Android: layout_marginTop = "14sp"
Android: background = "# fff7f7f7"/>

Ii. page Jump

In general, the following process is taken into account to achieve page Jump:

A) add a click event to the control.

Scenario: There are two interfaces, A and B. There is A Button btn in interface A. You need to click btn to jump to interface B.

In the class that implements Activty (sometimes OnClickListener may be implemented to distinguish different controls,

① Define a private Button btnTZ = null;

② In the onCreate method, btnTZ = (Button) findViewById (R. id. btnTZ); get the ing object of the Button;

③ Associate the Click Event listener of the button with the specific implementation method:

                   btnTZ.setOnClickListener(this);

Public void onClick (View v) {// some processing logic, and then specific jump}

Or

BtnClassSpace. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {// specific jump

                     }                });

B) Specific jump

Intent intent = new Intent(DigitalschoolActivity.this,WebviewActivty.class);WebviewModel viewModel = new WebviewModel(title, uri);intent.putExtra("WebviewModel", viewModel);startActivity(intent);