如何在几行中逐个创建按钮列表?我做的:
LinearLayout layout = (LinearLayout) findViewById(R.id.linear_layout_tags);
for (int i = 1; i < 10; i++) {
Button btnTag = new Button(this);
btnTag.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
btnTag.setText("Button " + i);
btnTag.setId(i);
layout.addView(btnTag);
((Button) findViewById(i)).setOnClickListener(this);
}
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并且只有一行:

如何以编程方式进入下一行?
在ListView我的每个项目中EditText.
当我设置android:focusable="false"为EditText然后onItemClick该ListView项目正在工作,但EditText我click在里面时没有得到光标.
如果我将设置android:focusable="true"为EditText,则EditText可获得焦点,但onItemClick对于ListView当我点击它不工作.
如何分离onItemClick和关注EditText这个项目?
我正在使用github.com/jackc/pgxpostgreSQL 进行工作。不,我想将 pgx.Rows 从 Query() 转换为 json 数组。我尝试了 func *sql.Rows,但它不起作用*pgx.Rows
func PgSqlRowsToJson(rows *pgx.Rows) []byte {
fieldDescriptions := rows.FieldDescriptions()
var columns []string
for _, col := range fieldDescriptions {
columns = append(columns, col.Name)
}
count := len(columns)
tableData := make([]map[string]interface{}, 0)
values := make([]interface{}, count)
valuePtrs := make([]interface{}, count)
for rows.Next() {
for i := 0; i < count; i++ {
valuePtrs[i] = &values[i]
}
rows.Scan(valuePtrs...)
entry := make(map[string]interface{})
for i, col := range columns {
var …Run Code Online (Sandbox Code Playgroud) 当我在这个主要方面宣布我的主要活动时:
<activity android:name=".MyActivity"
android:configChanges="orientation|keyboardHidden"
android:windowSoftInputMode="stateHidden"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<action android:name="com.package.name.MyActivity"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
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然后我No Activity found to handle Intent { act=com.package.name.MyActivity flg=0x24000000 }在使用此代码时出错:
Intent intent = new Intent("com.package.name.MyActivity");
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(intent);
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如果不使用Intent i = new Intent(this, MyActivity.class);我怎么能做到这一点的帮助下action进行<intent-filter>
没有帮助:
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<action android:name="com.package.name.VIEW"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
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码:
Intent intent = new Intent("com.package.name.VIEW");
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(intent);
Run Code Online (Sandbox Code Playgroud) 我通过使用Flags开始我的旧Activity,Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP但我不能通过使用以下方法将String发送到此Activity putExtra:
Intent intent = new Intent(INTENT_ActivityA);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("DATA", "OK");
startActivity(intent);
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在里面 onResume getIntent().getStringExtra("DATA")==null
如何将数据发送到正在运行的Activity?
onCreateView因为我在FragmentPagerAdapter中的第一个片段不是很快.因此,将curent tab更改为第一个有延迟.
如何禁用在选项卡选项卡上的FragmentPagerAdapter中重新创建第一个片段?
private class TabsAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener, ActionBar.TabListener {
private final Context context;
private ActionBar bar;
private final ViewPager viewPager;
private final ArrayList<TabInfo> tabs = new ArrayList<TabInfo>();
final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
TabsAdapter(SherlockFragmentActivity activity, ViewPager pager) {
super(activity.getSupportFragmentManager());
context = activity;
bar = activity.getSupportActionBar();
viewPager = pager;
viewPager.setAdapter(this);
viewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss, …Run Code Online (Sandbox Code Playgroud) 我用android ver在Transformer Prime 201上安装了我的.apk .4.0.3但是ProgressDialog看起来不像设备上的自定义ProgressDialog.
为什么会这样?在设备上使用自定义ProgressDialog样式的代码中,我必须更改哪些内容?
ProgressDialog progressDialog = new ProgressDialog(this.context);
progressDialog.setIndeterminate(true);
progressDialog.setCancelable(true);
progressDialog.setOnCancelListener(this);
progressDialog.setCanceledOnTouchOutside(false);
progressDialog.setMessage(MESSAGE);
progressDialog.show();
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android styles progressdialog android-4.0-ice-cream-sandwich
初始化字段哪个更好?在构造函数(var.1)或声明(var.2)中?
变种.1
public class UtilWebLoading {
private int data;
private Context context;
public UtilWebLoading(Context context) {
this.context = context;
data = 100;
}
...
}
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变种.2
public class UtilWebLoading {
private int data = 100;
private Context context;
public UtilWebLoading(Context context) {
this.context = context;
}
...
}
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android-4.0-ice-cream-sandwich ×1
button ×1
focusable ×1
go ×1
intentfilter ×1
java ×1
onitemclick ×1
postgresql ×1
styles ×1