Question

我正在尝试创建一种方法，每当我点击一个按钮时，我希望屏幕在当前存在的一个下方显示一个相对布局框，或者如果那里没有一个，则在顶部创建一个我希望它从每个按钮点击下面继续创建它们。目前，它只是按预期显示屏幕顶部的“相对布局”框。

这是我到目前为止的代码，有人可以帮助我看看我做错了什么以及我可以做些什么来解决这个问题：

onCreate code：

    Resources r = this.getResources();
    dpMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 16, r.getDisplayMetrics()); //Changes pixels to dp of margins
    dpContainerHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 80, r.getDisplayMetrics()); //Changes pixels to dp of container height
    dpContainerPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10, r.getDisplayMetrics()); //Changes pixels to dp of container padding

    layout = new RelativeLayout(this);

    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
    RelativeLayout.LayoutParams textParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams textParams2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams textParams3 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams textParams4 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams progressParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams imageButtonParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams newLayoutButtonParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams containerParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);
    RelativeLayout.LayoutParams containerParams2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);

    layout.setPadding(dpMargin, dpMargin, dpMargin, dpMargin);

    //Declaring new views
    tv1 = new TextView(this);
    tv2 = new TextView(this);
    containerLayout1 = new RelativeLayout(this);
    containerLayout2 = new RelativeLayout(this);
    tv3 = new TextView(this);
    tv4 = new TextView(this);
    pb1 = new ProgressBar(this);
    ib1 = new ImageButton(this);
    newLayoutButton = new Button(this);

    //Declaring views ID's
    tv1.setId(1);
    tv2.setId(2);
    containerLayout1.setId(3);
    containerLayout2.setId(4);
    tv3.setId(5);
    tv4.setId(6);
    pb1.setId(7);
    ib1.setId(8);
    newLayoutButton.setId(9);

    //Text view 1
    textParams1.addRule(RelativeLayout.ALIGN_PARENT_TOP);
    textParams1.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
    tv1.setText("TextView1");

    //Text view 2
    textParams2.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    textParams2.addRule(RelativeLayout.BELOW, tv1.getId());
    textParams2.setMargins(0, 0, 0, dpMargin);
    tv2.setText("TextView2");

    //Container 1
    containerParams1.addRule(RelativeLayout.ALIGN_LEFT, tv2.getId());
    containerParams1.addRule(RelativeLayout.ALIGN_RIGHT, tv1.getId());
    containerParams1.addRule(RelativeLayout.BELOW, tv2.getId());
    containerParams1.setMargins(0, 0, 0, dpMargin);
    containerLayout1.setPadding(dpContainerPadding, 0, dpContainerPadding, dpContainerPadding);
    containerLayout1.setBackgroundResource(R.color.display_panels);

    //Container 2
    containerParams2.addRule(RelativeLayout.ALIGN_LEFT, containerLayout1.getId());
    containerParams2.addRule(RelativeLayout.ALIGN_RIGHT, containerLayout1.getId());
    containerParams2.addRule(RelativeLayout.BELOW, containerLayout1.getId());
    containerParams2.setMargins(0, 0, 0, dpMargin);
    containerLayout2.setBackgroundResource(R.color.display_panels);

    //Text view 3
    textParams3.addRule(RelativeLayout.ABOVE, tv4.getId());
    textParams3.addRule(RelativeLayout.ALIGN_LEFT, pb1.getId());
    tv3.setText("TextView3");
    tv3.setTextAppearance(this, android.R.style.TextAppearance_Small); //Need to change text colour to white
    tv3.setTextColor(getResources().getColor(R.color.text_colour));

    //Text view 4
    textParams4.addRule(RelativeLayout.ABOVE, pb1.getId());
    textParams4.addRule(RelativeLayout.CENTER_HORIZONTAL);
    tv4.setText("TextView4");
    tv4.setTextAppearance(this, android.R.style.TextAppearance_Small); //Need to change text colour to white
    tv4.setTextColor(getResources().getColor(R.color.text_colour));

    //Progress bar 1
    progressParams1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
    progressParams1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    progressParams1.addRule(RelativeLayout.LEFT_OF, ib1.getId());
    pb1.setProgress(40);
    pb1.setMax(100);

    //Image button 1
    imageButtonParams1.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
    imageButtonParams1.addRule(RelativeLayout.BELOW, tv4.getId());
    ib1.setBackgroundResource(R.color.display_panels);
    ib1.setImageResource(R.drawable.ic_green_ok);

    newLayoutButtonParams.addRule(RelativeLayout.ABOVE, tv2.getId());
    newLayoutButton.setText("New Layout");
    newLayoutButton.setOnClickListener(this);

    layout.addView(tv1, textParams1);
    layout.addView(tv2, textParams2);
    layout.addView(newLayoutButton, newLayoutButtonParams);
    containerLayout1.addView(tv3, textParams3);
    containerLayout1.addView(tv4, textParams4);
    containerLayout1.addView(pb1, progressParams1);
    containerLayout1.addView(ib1, imageButtonParams1);
    layout.addView(containerLayout1, containerParams1);
    layout.addView(containerLayout2, containerParams2);
    setContentView(layout, layoutParams);

createNewLayout方法代码：

public RelativeLayout createNewLayout(RelativeLayout newlayout){

    newLayoutContainer = new RelativeLayout(this);
    final RelativeLayout.LayoutParams newLayoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);
    newLayoutContainer.setLayoutParams(newLayoutParams);

    newLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    newLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
    newLayoutParams.addRule(RelativeLayout.BELOW);
    newLayoutParams.setMargins(0, 0, 0, dpMargin);
    newLayoutContainer.setBackgroundResource(R.color.display_panels);

    return newLayoutContainer;

}

onClick代码：

    public void onClick(View v) {
    // TODO Auto-generated method stub
    if(v==newLayoutButton){

        layout.addView(createNewLayout(newLayoutContainer), 0);

    }
}

修改

新方法代码：

public void createNewLayout(){

    int currentId = 1;

    for(int i = 1; i <= numberOfLayouts; i++){
        newLayoutContainer = new RelativeLayout(this);
        newLayoutContainer.setId(currentId);

        if(currentId == 1){
            newLayoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);
            newLayoutParams.addRule(RelativeLayout.ALIGN_LEFT, containerLayout2.getId());
            newLayoutParams.addRule(RelativeLayout.ALIGN_RIGHT, containerLayout2.getId());
            newLayoutParams.addRule(RelativeLayout.BELOW, containerLayout2.getId());
            newLayoutParams.setMargins(0, 0, 0, dpMargin);
            newLayoutContainer.setBackgroundResource(R.color.display_panels);
        }

        else{
            newLayoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);
            newLayoutParams.addRule(RelativeLayout.ALIGN_LEFT, newLayoutContainer.getId());
            newLayoutParams.addRule(RelativeLayout.ALIGN_RIGHT, newLayoutContainer.getId());
            newLayoutParams.addRule(RelativeLayout.BELOW, currentId);
            newLayoutParams.setMargins(0, 0, 0, dpMargin);
            newLayoutContainer.setBackgroundResource(R.color.display_panels);
        }

        newLayoutContainer.setLayoutParams(newLayoutParams);
        layout.addView(newLayoutContainer);

        currentId++;
    }

}

Answer 1

您可以使用全局变量来存储分配给布局的currentId，并在每次添加布局时更新它。

int currentId = 10;

按钮点击功能

public void onClick(View v) {

if(v==newLayoutButton){

    layout.addView(createNewLayout(newLayoutContainer,currentId), 0);
    currentId++;

    }
}

createNewLayout函数将另外一个属性为currentId。

public RelativeLayout createNewLayout(RelativeLayout newlayout, int currentId){

newLayoutContainer = new RelativeLayout(this);

final RelativeLayout.LayoutParams newLayoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);

newLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
newLayoutParams.addRule(RelativeLayout.BELOW, currentId);
newLayoutParams.setMargins(0, 0, 0, dpMargin);

newLayoutContainer.setLayoutParams(newLayoutParams);

newLayoutContainer.setBackgroundResource(R.color.display_panels);

return newLayoutContainer;
}

试试这个有效的代码：

int currentId = 5;
@Override
public void onClick(View v) {
    if(v.getId()==9){
        containerLayout2.addView(createNewLayout(currentId), 0);
        currentId +=10;
    }
}

createNewLayoutFunction

public RelativeLayout createNewLayout(int currentId){

    RelativeLayout newLayoutContainer = new RelativeLayout(this);

    final RelativeLayout.LayoutParams newLayoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

    newLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    newLayoutParams.addRule(RelativeLayout.BELOW, currentId);
    newLayoutParams.setMargins(0, 0, 0, dpMargin);

    newLayoutContainer.setLayoutParams(newLayoutParams);

    RelativeLayout.LayoutParams image = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    ImageView x = new ImageView(this);
    x.setImageResource(android.R.drawable.ic_media_play);

    newLayoutContainer.addView(x, image);

    newLayoutContainer.setId(currentId+10);
    newLayoutContainer.setBackgroundResource(R.color.display_panels);

    return newLayoutContainer;
    }

也会在containerParams2中更改此行

RelativeLayout.LayoutParams containerParams2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight+330);

这应该可以正常工作。在我的代码中工作。

在Android中以编程方式在当前相对布局下添加相对布局

1 个答案: