项目实战（新闻客户端）步步为营
9 Main.xml <?xml<LinearLayout <TabHost <LinearLayout <FrameLayout </FrameLayout> <TabWidget <RelativeLayout <RadioGroup <RadioButton <RadioButton <RadioButton <RadioButton <RadioButton </RadioGroup> </RelativeLayout> </LinearLayout> </TabHost></LinearLayout> package com.and.netease;import com.and.netease.utils.MoveBg;import android.app.TabActivity;import android.content.Intent;import android.os.Bundle;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.TabHost;public class MainActivity extends TabActivity { TabHost tabHost; TabHost.TabSpec tabSpec; RadioGroup radioGroup; RelativeLayoutbottom_layout; ImageView img; int startLeft; @Override public void onCreate(BundlesavedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); bottom_layout =(RelativeLayout) findViewById(R.id.layout_bottom); tabHost = getTabHost(); tabHost.addTab(tabHost.newTabSpec("news").setIndicator("News").setContent(newIntent(this, TabNewsActivity.class))); tabHost.addTab(tabHost.newTabSpec("topic").setIndicator("Topic").setContent(newIntent(this, TabTopicActivity.class))); tabHost.addTab(tabHost.newTabSpec("picture").setIndicator("Picture").setContent(newIntent(this, TabPicActivity.class))); tabHost.addTab(tabHost.newTabSpec("follow").setIndicator("Follow").setContent(newIntent(this, TabFollowActivity.class))); tabHost.addTab(tabHost.newTabSpec("vote").setIndicator("Vote").setContent(newIntent(this, TabVoteActivity.class))); radioGroup =(RadioGroup) findViewById(R.id.radiogroup); radioGroup.setOnCheckedChangeListener(checkedChangeListener); img = newImageView(this); img.setImageResource(R.drawable.tab_front_bg); bottom_layout.addView(img); } privateOnCheckedChangeListener checkedChangeListener = new OnCheckedChangeListener(){ @Override public voidonCheckedChanged(RadioGroup group, int checkedId) { switch(checkedId) { caseR.id.radio_news: tabHost.setCurrentTabByTag("news");// moveFrontBg(img,startLeft, 0, 0, 0); MoveBg.moveFrontBg(img,startLeft, 0, 0, 0); startLeft= 0; break; caseR.id.radio_topic: tabHost.setCurrentTabByTag("topic"); MoveBg.moveFrontBg(img,startLeft, img.getWidth(), 0, 0); startLeft= img.getWidth(); break; caseR.id.radio_pic: tabHost.setCurrentTabByTag("picture"); MoveBg.moveFrontBg(img,startLeft, img.getWidth() * 2, 0, 0); startLeft= img.getWidth() * 2; break; caseR.id.radio_follow: tabHost.setCurrentTabByTag("follow"); MoveBg.moveFrontBg(img,startLeft, img.getWidth() * 3, 0, 0); startLeft= img.getWidth() * 3; break; caseR.id.radio_vote: tabHost.setCurrentTabByTag("vote"); MoveBg.moveFrontBg(img,startLeft, img.getWidth() * 4, 0, 0); startLeft= img.getWidth() * 4; break; default: break; } } };} package com.and.netease.utils;import android.view.View;importandroid.view.animation.TranslateAnimation;public class MoveBg { /** * 移动方法 * * @param v * 需要移动的View * @param startX * 起始x坐标 * @param toX * 终止x坐标 * @param startY * 起始y坐标 * @param toY * 终止y坐标 */ publicstatic void moveFrontBg(View view, int startX, int toX, int startY, int toY){ TranslateAnimationanim = new TranslateAnimation(startX, toX, startY, toY); anim.setDuration(200); anim.setFillAfter(true); view.startAnimation(anim); }} <?xml<LinearLayout <RelativeLayout <ImageView <TextView <ImageView </RelativeLayout> <RelativeLayout <LinearLayout <RelativeLayout <TextView </RelativeLayout> <RelativeLayout <TextView </RelativeLayout> <RelativeLayout <TextView </RelativeLayout> <RelativeLayout <TextView </RelativeLayout> <RelativeLayout <TextView </RelativeLayout> <RelativeLayout <TextView </RelativeLayout> </LinearLayout> </RelativeLayout></LinearLayout> package com.and.netease;import com.and.netease.utils.MoveBg;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.widget.RelativeLayout;import android.widget.RelativeLayout.LayoutParams;import android.widget.TextView;public class TabNewsActivity extends Activity { RelativeLayout layout; TextView tv_front;//需要移动的View TextView tv_bar_news; TextView tv_bar_sport; TextView tv_bar_play; TextView tv_bar_finance; TextView tv_bar_science; TextView tv_bar_more; int avg_width = 0;// 用于记录平均每个标签的宽度，移动的时候需要 @Override protected voidonCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_news); initViews(); } private void initViews(){ layout =(RelativeLayout) findViewById(R.id.layout_title_bar); tv_bar_news =(TextView) findViewById(R.id.tv_title_bar_news); tv_bar_sport =(TextView) findViewById(R.id.tv_title_bar_sport); tv_bar_play =(TextView) findViewById(R.id.tv_title_bar_play); tv_bar_finance =(TextView) findViewById(R.id.tv_title_bar_finance); tv_bar_science =(TextView) findViewById(R.id.tv_title_bar_science); tv_bar_more =(TextView) findViewById(R.id.tv_title_bar_more); tv_bar_news.setOnClickListener(onClickListener); tv_bar_sport.setOnClickListener(onClickListener); tv_bar_play.setOnClickListener(onClickListener); tv_bar_finance.setOnClickListener(onClickListener); tv_bar_science.setOnClickListener(onClickListener); tv_bar_more.setOnClickListener(onClickListener); tv_front = newTextView(this); tv_front.setBackgroundResource(R.drawable.slidebar); tv_front.setTextColor(Color.WHITE); tv_front.setText("头条"); tv_front.setGravity(Gravity.CENTER); RelativeLayout.LayoutParamsparam = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT); param.addRule(RelativeLayout.CENTER_VERTICAL,RelativeLayout.TRUE); layout.addView(tv_front,param); } private OnClickListeneronClickListener = new OnClickListener() { int startX;//移动的起始位置 @Override public voidonClick(View v) { avg_width =findViewById(R.id.layout).getWidth(); switch(v.getId()) { caseR.id.tv_title_bar_news: MoveBg.moveFrontBg(tv_front,startX, 0, 0, 0); startX= 0; tv_front.setText(R.string.title_news_category_tops); break; caseR.id.tv_title_bar_sport: MoveBg.moveFrontBg(tv_front,startX, avg_width, 0, 0); startX= avg_width; tv_front.setText(R.string.title_news_category_sport); break; caseR.id.tv_title_bar_play: MoveBg.moveFrontBg(tv_front,startX, avg_width * 2, 0, 0); startX= avg_width * 2; tv_front.setText(R.string.title_news_category_play); break; caseR.id.tv_title_bar_finance: MoveBg.moveFrontBg(tv_front,startX, avg_width * 3, 0, 0); startX= avg_width * 3; tv_front.setText(R.string.title_news_category_finance); break; caseR.id.tv_title_bar_science: MoveBg.moveFrontBg(tv_front,startX, avg_width * 4, 0, 0); startX= avg_width * 4; tv_front.setText(R.string.title_news_category_science); break; caseR.id.tv_title_bar_more: MoveBg.moveFrontBg(tv_front,startX, avg_width * 5, 0, 0); startX= avg_width * 5; tv_front.setText(R.string.title_news_category_more); break; default: break; } } };} tabActivity的功能。这里不再赘述。layout_topic.xml） <?xml<LinearLayout <RelativeLayout <ImageView <TextView </RelativeLayout></LinearLayout> package com.and.netease;import android.app.Activity;import android.os.Bundle;public class TabTopicActivity extends Activity { @Override protected voidonCreate(Bundle savedInstanceState) { // TODOAuto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.layout_topic); }} </div
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