我对 android 比较陌生。在我的项目中，我有一个所有活动通用的布局。我正在尝试在 Android 中重用我的布局。以下是我的代码
主要活动
public class MainActivity extends Activity implements OnClickListener {
EditText emailEdit, passwordEdit;
Button loginButton;
TitleBarLayout titlebarLayout;
String r;
String rr;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_activity);
emailEdit = (EditText) findViewById(R.id.etEmail);
passwordEdit = (EditText) findViewById(R.id.etPassword);
loginButton = (Button) findViewById(R.id.loginButton);
loginButton.setOnClickListener(this);
//titlebarLayout=(TitleBarLayout) findViewById(R.id.titlebar);
titlebarLayout=new TitleBarLayout(MainActivity.this);
titlebarLayout.setLeftButtonText("Refresh");
titlebarLayout.setRightButtonText("Logout");
titlebarLayout.setTitle("iProtect");
OnClickListener listener=new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v.getId()==R.id.left_button)
{}
else if(v.getId()==R.id.right_button)
{}
}
};
titlebarLayout.setLeftButtonOnClickListener(listener);
titlebarLayout.setRightButtonOnClickListener(listener);
}
}
login_activity.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/layout_bg_color">
<include layout="@layout/titlebar_layout"
android:id="@+id/titlebar"/>
<EditText
android:id="@+id/etEmail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@layout/titlebar_layout"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dp"
android:layout_marginTop="100dip"
android:background="@drawable/emailedit"
android:inputType="textEmailAddress"
android:maxEms="20"
android:paddingLeft="70dip"
android:singleLine="true"
android:text="user@gmail.com" />
<EditText
android:id="@+id/etPassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/etEmail"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dp"
android:layout_marginTop="0dip"
android:background="@drawable/passwordedit"
android:inputType="textPassword"
android:maxEms="20"
android:paddingLeft="70dip"
android:singleLine="true"
android:text="123456" />
<Button
android:id="@+id/loginButton"
android:layout_width="@dimen/login_button_width"
android:layout_height="@dimen/login_button_height"
android:layout_below="@+id/etPassword"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dip"
android:text="Login"
android:textStyle="bold"
android:background="@android:color/white"/>
<ImageView
android:id="@+id/ivFooter"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_below="@+id/loginButton"
android:layout_marginTop="360dip"
android:adjustViewBounds="true"
android:baselineAlignBottom="false"
android:cropToPadding="false"
android:src="@drawable/footer" />
</RelativeLayout>
标题栏布局.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="@dimen/titlebar_height"
android:background="@color/title_bg_color"
android:gravity="center_vertical"
android:orientation="horizontal">
<Button
android:id="@+id/left_button"
android:layout_width="@dimen/titlebar_button_width"
android:layout_height="@dimen/titlebar_button_height"
android:background="#000000"/>
<TextView
android:id="@+id/title_textview"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="@string/app_name"
android:textColor="@android:color/white"
android:textStyle="bold" />
<Button
android:id="@+id/right_button"
android:layout_width="@dimen/titlebar_button_width"
android:layout_height="@dimen/titlebar_button_height" />
</LinearLayout>
和 TitleBarLayout.java
public class TitleBarLayout extends LinearLayout {
private WeakReference<Activity> activityRef;
//Button leftButton, rightButton;
private View contentView;
Button leftButton,rightButton;
TextView titletext;
public TitleBarLayout(Activity a) {
super(a);
Log.i("TitleBar Layout", "Inside constructor");
activityRef = new WeakReference<Activity>(a);
inflateViewsFromXml();
setListenersOnViews();
setValuesOnViews();
}
private void setValuesOnViews() {
// TODO Auto-generated method stub
}
private void setListenersOnViews() {
// TODO Auto-generated method stub
}
private void inflateViewsFromXml() {
Activity a = activityRef.get();
LayoutInflater inflater = (LayoutInflater) a.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
contentView = inflater.inflate(R.layout.titlebar_layout, null);
}
public void setLeftButtonText(int resID) {
}
public void setLeftButtonText(String resID) {
Log.v("Button", "Button Text="+resID);
if (contentView != null) {
leftButton = (Button)contentView.findViewById(R.id.left_button);
Log.i("ERROR", "Inside setLeftButtonText");
leftButton.setText(""+resID);
leftButton.setTextColor(Color.WHITE);
}
}
public void setLeftButtonOnClickListener(View.OnClickListener listener) {
leftButton.setOnClickListener(listener);
}
public void setRightButtonText(int resID) {
}
public void setRightButtonText(String resID) {
Log.v("Button", "Button Text="+resID);
if (contentView != null) {
Log.i("ERROR", "Inside setRightButtonText");
rightButton = (Button)contentView.findViewById(R.id.right_button);
rightButton.setTextColor(Color.BLACK);
rightButton.setText(""+resID);
}
}
public void setRightButtonOnClickListener(View.OnClickListener listener) {
rightButton.setOnClickListener(listener);
}
public void setTitle(int resID) {
}
public void setTitle(String resID) {
//@string/app_name
Log.v("TextView", "Text="+resID);
if (contentView == null) {
Log.i("ERROR", "Inside setTitle");
titletext = (TextView)contentView.findViewById(R.id.title_textview);
titletext.setText(""+resID);
}
}
}
我想在运行时在按钮上添加文本。但我不明白吗？我可以在 Logcat 上看到文本，但在按钮上看不到？