Question

我想通过点击每个按钮来更改main_inflater的膨胀视图。

这是我的源代码;

我启动了我的两个按钮和setOnListener到两个按钮。

但是inflater只是展示了第一次夸大的观点。

public class MainActivity extends Activity implements OnClickListener{

//optionmenu
int titleHeight;
int mainHeight;
int menuHeight;

//objects
TextView tv_status;
Tabbar tb_status;
LinearLayout titleLayout;
LinearLayout mainLayout;
LinearLayout menuLayout;
Button btn1;
Button btn2;

LayoutInflater main_inflater;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);
    layout_init();
    btn_init();


}   

public void layout_init() {

    DisplayMetrics displayMetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
    int deviceWidth = displayMetrics.widthPixels;
    int deviceHeight = displayMetrics.heightPixels;
    titleHeight = 2*deviceHeight/26;
    mainHeight = 21*deviceHeight/26;
    menuHeight = 3*deviceHeight/26;

    main_inflater = (LayoutInflater) this.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    //initiate Layouts
    titleLayout = (LinearLayout) findViewById(R.id.title_layout);
    mainLayout = (LinearLayout) findViewById(R.id.main_layout);
    menuLayout = (LinearLayout) findViewById(R.id.menu_layout);

    titleLayout.getLayoutParams().height = titleHeight;
    mainLayout.getLayoutParams().height = mainHeight;
    menuLayout.getLayoutParams().height = menuHeight;

    main_inflater.inflate(R.layout.viewpager_layout, mainLayout, true);


}

public void btn_init() {
    btn1 = (Button) findViewById(R.id.button1);
    btn2 = (Button) findViewById(R.id.button2);
    btn1.setOnClickListener(this);
    btn2.setOnClickListener(this);
}


@Override

public void onClick(View v) {
    if(v.getId() == R.id.button1)
    {
        main_inflater.inflate(R.layout.viewpager_layout, mainLayout, false);
    }
    if(v.getId() == R.id.button2)
    {
        main_inflater.inflate(R.layout.person_info, mainLayout, false);}

    Toast.makeText(getBaseContext() , "id : "+v.getId() ,Toast.LENGTH_SHORT ).show();


}

}

toast消息正在运行。但是inflater没有改变观点。请告诉我为什么bbbb

Answer 1

Inflater除了使视图膨胀之外什么都不做，即将viewpager_layout.xml的xml转换为实际对象，即View或View的子类。

如果您尝试设置整个活动的视图......

替换

main_inflater.inflater(R.layout.viewpager_layout, mainLayout, true);

以下内容：

setContentView(R.layout.viewpager_layout);

Answer 2

在onClick方法中，您将false作为最后一个参数传递给inflate。这可以防止膨胀的布局附加到根。尝试将true作为最后一个参数传递，如下所示：

public void onClick(View v) {
    if(v.getId() == R.id.button1)
    {
        mainLayout.removeAllViews();
        main_inflater.inflate(R.layout.viewpager_layout, mainLayout, true);
    }
    if(v.getId() == R.id.button2)
    {
        mainLayout.removeAllViews();
        main_inflater.inflate(R.layout.person_info, mainLayout, true);
    }
    Toast.makeText(getBaseContext() , "id : "+v.getId() ,Toast.LENGTH_SHORT ).show();    
}

如何更改inflater的视图？

2 个答案: