根据先前的请求重新编写代码...我在运行时动态添加TableLayouts。视图纲要看起来像这样...... LinearLayout-＆gt; ScrollView-＆gt; TableLayout-＆gt;循环在运行时创建TableLayouts和TableRows。所以基本上我循环并添加以下内容：
for（i = 0 .... i ++）
左中右翼
底
现在一切都正确添加，看起来正确并正确滚动。但是，我正在尝试创建一个onTouch事件，该事件会更改触摸动态创建的TableLayout上的背景。在每个动态创建的TableLayout的onTouch内部，我有一个onTouch事件，在调用时会执行以下操作：
tableLayoutRow1.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("OnTouch", "OnTouch Event for " + Integer.toString(v.getId()) + " event:" + Integer.toString(event.getAction()));
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
Log.d("OnTouch", "Changing to GREEN");
v.setBackgroundColor(Color.GRAY);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_MOVE:
Log.d("OnTouch", "Changing to BLACK");
v.setBackgroundColor(Color.BLACK);
break;
}
return true;
}
});
每当它调用setBackgroundColor时，它会混乱每个动态创建的TableLayouts的对齐方式，并使它们看起来像这样：
LeftMiddleRight
底
整个代码如下。我希望现在很清楚。
public class TableActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
linearLayout.setWeightSum(1);
ScrollView scrollView = new ScrollView(this);
scrollView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
TableLayout tableLayoutMaster = new TableLayout(this);
tableLayoutMaster.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
// <table>
// <tr><td><table><tr><td></td><td></td><td></td></tr></table></td></tr>
// <tr><td></td></tr>
// </table>
for(int i=0; i<=30; i++)
{
TableLayout tableLayoutRow1 = new TableLayout(this);
tableLayoutRow1.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
tableLayoutRow1.setColumnStretchable(2, true);
//tableLayoutRow1.setBackgroundColor(Color.GREEN);
TableRow tableRow = new TableRow(this);
ImageView left_column = new ImageView(this);
left_column.setImageResource(17301550);
tableRow.addView(left_column);
TextView middle_column = new TextView(this);
middle_column.setText("Left Column:" + Integer.toString(i));
middle_column.setTypeface(null, Typeface.BOLD);
middle_column.setGravity(Gravity.LEFT);
middle_column.setPadding(5, 0, 0, 0);
tableRow.addView(middle_column);
TextView right_column = new TextView(this);
right_column.setText("Right Column:" + Integer.toString(i));
right_column.setTypeface(null, Typeface.BOLD);
right_column.setGravity(Gravity.RIGHT);
right_column.setPadding(0, 0, 5, 0);
tableRow.addView(right_column);
tableLayoutRow1.addView(tableRow);
tableRow = null;
// now for the bottom row
TextView bottom_column = new TextView(this);
bottom_column.setText("Starting activity com.developersinfo.testing.TableActivity on device emulator-5554");
bottom_column.setTextSize(12f);
bottom_column.setGravity(Gravity.LEFT);
bottom_column.setPadding(30, 0, 0, 0);
tableLayoutRow1.addView(bottom_column);
tableLayoutRow1.setId(i);
tableLayoutRow1.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
// TODO Auto-generated method stub
Log.d("OnFocusChange", "OnFocusChange Event for " + Integer.toString(v.getId()));
}
});
tableLayoutRow1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.d("OnClick", "OnClick Event for " + Integer.toString(v.getId()));
}
});
tableLayoutRow1.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("OnTouch", "OnTouch Event for " + Integer.toString(v.getId()) + " event:" + Integer.toString(event.getAction()));
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
Log.d("OnTouch", "Changing to GREEN");
v.setBackgroundColor(Color.GRAY);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_MOVE:
Log.d("OnTouch", "Changing to BLACK");
v.setBackgroundColor(Color.BLACK);
break;
}
return true;
}
});
// now add to master table
tableLayoutMaster.addView(tableLayoutRow1);
}
scrollView.addView(tableLayoutMaster);
linearLayout.addView(scrollView);
setContentView(linearLayout);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
}
我已经尝试了所有我能想到的东西，以防止它这样做，但到目前为止，我无法解释为什么或如何纠正它。只要我不在onTouch中调用setBackgroundColor，就会按预期滚动和对齐。
答案 0 :(得分：0)
我在我工作的项目中遇到的问题几乎完全相同。我花了很长时间试图弄清楚什么是错的，但最后只有解决方案就是抛弃桌面布局而去寻找别的东西。对我来说，它看起来像系统中的一个错误。
如果可能，我建议使用RelativeLayout。
答案 1 :(得分：0)
我在一个活动中测试你的代码，我不认为并且没有看到对齐是坏的，当触摸表格行时它看起来不错......（我的意思是onTouchEvent不会弄乱布局对齐。 无论如何，我建议你使用ListActivity，如果这样做，你可以设置一个选择器背景到内部视图，一个颜色或drawable到任何视图状态，选择，按下......以及更多...和内部视图内部你可以使用相对布局或其他布局...... 还有一件事，ListActivity使用非常有效的ListAdapter，视图被虚拟化意味着设备不必保存所有视图，只有那些可见的视图而不是实际持有的30 * 4视图。
答案 2 :(得分：0)
感谢你们两位的见解。我将查看ListActivity和ListAdapters，但这更像是一次了解远征而不是此时的任何事情。我有这个工作使用Juhani建议的大锤方法。
public class TestLayout extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ScrollView scrollView = new ScrollView(this);
scrollView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
LinearLayout layout_master = new LinearLayout(this);
layout_master.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
layout_master.setOrientation(LinearLayout.VERTICAL);
scrollView.addView(layout_master);
for(int i=1; i<=30; i++)
{
RelativeLayout layout_body = new RelativeLayout(this);
TextView left_Column = new TextView(this);
left_Column.setId(i);
left_Column.setText("Left");
left_Column.setGravity(Gravity.LEFT);
left_Column.setPadding(5, 0, 5, 0);
TextView middle_Column = new TextView(this);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.RIGHT_OF, left_Column.getId());
middle_Column.setLayoutParams(lp);
middle_Column.setText("Middle");
middle_Column.setGravity(Gravity.LEFT);
middle_Column.setPadding(5, 0, 5, 0);
TextView right_Column = new TextView(this);
lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
right_Column.setLayoutParams(lp);
right_Column.setText("Right");
right_Column.setGravity(Gravity.RIGHT);
right_Column.setPadding(5, 0, 5, 0);
layout_body.addView(left_Column);
layout_body.addView(middle_Column);
layout_body.addView(right_Column);
TextView bottom = new TextView(this);
bottom.setId(1000 + i);
lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.BELOW, left_Column.getId());
bottom.setLayoutParams(lp);
bottom.setText("Starting activity com.developersinfo.testing.TestLayout on device emulator-5554");
layout_body.addView(bottom);
View view_hr = new View(this);
view_hr.setMinimumWidth(layout_body.getWidth());
view_hr.setMinimumHeight(1);
view_hr.setBackgroundColor(Color.GRAY);
lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.BELOW, bottom.getId());
view_hr.setLayoutParams(lp);
layout_body.addView(view_hr);
layout_body.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
Log.d("OnTouch", "Changing to GREEN");
v.setBackgroundColor(Color.GREEN);
break;
default:
Log.d("OnTouch", "Changing to BLACK");
v.setBackgroundColor(Color.BLACK);
break;
}
return true;
}
});
layout_master.addView(layout_body);
}
//scrollView.addView(layout_master);
setContentView(scrollView);
}
}