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下面的例子为使用自定义的列表适配器来显示列表.

复制代码 代码如下

View Code import android.os.Bundle; import android.app.ListActivity; import android.content.Context; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.LinearLayout; import android.widget.TextView; public class MainActivity extends ListActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setListAdapter(new SpeechListAdapter(this)); } /** * A sample ListAdapter that presents content from arrays of speeches and * text. * */ private class SpeechListAdapter extends BaseAdapter { public SpeechListAdapter(Context context) { mContext = context; } /** * The number of items in the list is determined by the number of speeches * in our array. * * @see android.widget.ListAdapter#getCount() */ public int getCount() { return mTitles.length; } /** * Since the data comes from an array, just returning the index is * sufficent to get at the data. If we were using a more complex data * structure, we would return whatever object represents one row in the * list. * * @see android.widget.ListAdapter#getItem(int) */ public Object getItem(int position) { return position; } /** * Use the array index as a unique id. * * @see android.widget.ListAdapter#getItemId(int) */ public long getItemId(int position) { return position; } /** * Make a SpeechView to hold each row. * * @see android.widget.ListAdapter#getView(int, android.view.View, * android.view.ViewGroup) */ public View getView(int position, View convertView, ViewGroup parent) { SpeechView sv; if (convertView == null) { sv = new SpeechView(mContext, mTitles[position], mDialogue[position]); } else { sv = (SpeechView) convertView; sv.setTitle(mTitles[position]); sv.setDialogue(mDialogue[position]); } return sv; } /** * Remember our context so we can use it when constructing views. */ private Context mContext; /** * Our data, part 1. */ private String[] mTitles = { "Henry IV (1)", "Henry V", "Henry VIII", "Richard II", "Richard III", "Merchant of Venice", "Othello", "King Lear" }; /** * Our data, part 2. */ private String[] mDialogue = { "So shaken as we are, so wan with care," + "Find we a time for frighted peace to pant," + "And breathe short-winded accents of new broils" + "To be commenced in strands afar remote." + "No more the thirsty entrance of this soil" + "Shall daub her lips with her own children's blood;" + "Nor more shall trenching war channel her fields," + "Nor bruise her flowerets with the armed hoofs" + "Of hostile paces: those opposed eyes," + "Which, like the meteors of a troubled heaven," + "All of one nature, of one substance bred," + "Did lately meet in the intestine shock" + "And furious close of civil butchery" + "Shall now, in mutual well-beseeming ranks," + "March all one way and be no more opposed" + "Against acquaintance, kindred and allies:" + "The edge of war, like an ill-sheathed knife," + "No more shall cut his master. Therefore, friends," + "As far as to the sepulchre of Christ," + "Whose soldier now, under whose blessed cross" + "We are impressed and engaged to fight," + "Forthwith a power of English shall we levy;" + "Whose arms were moulded in their mothers' womb" + "To chase these pagans in those holy fields" + "Over whose acres walk'd those blessed feet" + "Which fourteen hundred years ago were nail'd" + "For our advantage on the bitter cross." + "But this our purpose now is twelve month old," + "And bootless 'tis to tell you we will go:" + "Therefore we meet not now. Then let me hear" + "Of you, my gentle cousin Westmoreland," + "What yesternight our council did decree" + "In forwarding this dear expedience.", "Hear him but reason in divinity," + "And all-admiring with an inward wish" + "You would desire the king were made a prelate:" + "Hear him debate of commonwealth affairs," + "You would say it hath been all in all his study:" + "List his discourse of war, and you shall hear" + "A fearful battle render'd you in music:" + "Turn him to any cause of policy," + "The Gordian knot of it he will unloose," + "Familiar as his garter: that, when he speaks," + "The air, a charter'd libertine, is still," + "And the mute wonder lurketh in men's ears," + "To steal his sweet and honey'd sentences;" + "So that the art and practic part of life" + "Must be the mistress to this theoric:" + "Which is a wonder how his grace should glean it," + "Since his addiction was to courses vain," + "His companies unletter'd, rude and shallow," + "His hours fill'd up with riots, banquets, sports," + "And never noted in him any study," + "Any retirement, any sequestration" + "From open haunts and popularity.", "I come no more to make you laugh: things now," + "That bear a weighty and a serious brow," + "Sad, high, and working, full of state and woe," + "Such noble scenes as draw the eye to flow," + "We now present. Those that can pity, here" + "May, if they think it well, let fall a tear;" + "The subject will deserve it. Such as give" + "Their money out of hope they may believe," + "May here find truth too. Those that come to see" + "Only a show or two, and so agree" + "The play may pass, if they be still and willing," + "I'll undertake may see away their shilling" + "Richly in two short hours. Only they" + "That come to hear a merry bawdy play," + "A noise of targets, or to see a fellow" + "In a long motley coat guarded with yellow," + "Will be deceived; for, gentle hearers, know," + "To rank our chosen truth with such a show" + "As fool and fight is, beside forfeiting" + "Our own brains, and the opinion that we bring," + "To make that only true we now intend," + "Will leave us never an understanding friend." + "Therefore, for goodness' sake, and as you are known" + "The first and happiest hearers of the town," + "Be sad, as we would make ye: think ye see" + "The very persons of our noble story" + "As they were living; think you see them great," + "And follow'd with the general throng and sweat" + "Of thousand friends; then in a moment, see" + "How soon this mightiness meets misery:" + "And, if you can be merry then, I'll say" + "A man may weep upon his wedding-day.", "First, heaven be the record to my speech!" + "In the devotion of a subject's love," + "Tendering the precious safety of my prince," + "And free from other misbegotten hate," + "Come I appellant to this princely presence." + "Now, Thomas Mowbray, do I turn to thee," + "And mark my greeting well; for what I speak" + "My body shall make good upon this earth," + "Or my divine soul answer it in heaven." + "Thou art a traitor and a miscreant," + "Too good to be so and too bad to live," + "Since the more fair and crystal is the sky," + "The uglier seem the clouds that in it fly." + "Once more, the more to aggravate the note," + "With a foul traitor's name stuff I thy throat;" + "And wish, so please my sovereign, ere I move," + "What my tongue speaks my right drawn sword may prove.", "Now is the winter of our discontent" + "Made glorious summer by this sun of York;" + "And all the clouds that lour'd upon our house" + "In the deep bosom of the ocean buried." + "Now are our brows bound with victorious wreaths;" + "Our bruised arms hung up for monuments;" + "Our stern alarums changed to merry meetings," + "Our dreadful marches to delightful measures." + "Grim-visaged war hath smooth'd his wrinkled front;" + "And now, instead of mounting barded steeds" + "To fright the souls of fearful adversaries," + "He capers nimbly in a lady's chamber" + "To the lascivious pleasing of a lute." + "But I, that am not shaped for sportive tricks," + "Nor made to court an amorous looking-glass;" + "I, that am rudely stamp'd, and want love's majesty" + "To strut before a wanton ambling nymph;" + "I, that am curtail'd of this fair proportion," + "Cheated of feature by dissembling nature," + "Deformed, unfinish'd, sent before my time" + "Into this breathing world, scarce half made up," + "And that so lamely and unfashionable" + "That dogs bark at me as I halt by them;" + "Why, I, in this weak piping time of peace," + "Have no delight to pass away the time," + "Unless to spy my shadow in the sun" + "And descant on mine own deformity:" + "And therefore, since I cannot prove a lover," + "To entertain these fair well-spoken days," + "I am determined to prove a villain" + "And hate the idle pleasures of these days." + "Plots have I laid, inductions dangerous," + "By drunken prophecies, libels and dreams," + "To set my brother Clarence and the king" + "In deadly hate the one against the other:" + "And if King Edward be as true and just" + "As I am subtle, false and treacherous," + "This day should Clarence closely be mew'd up," + "About a prophecy, which says that 'G'" + "Of Edward's heirs the murderer shall be." + "Dive, thoughts, down to my soul: here" + "Clarence comes.", "To bait fish withal: if it will feed nothing else," + "it will feed my revenge. He hath disgraced me, and" + "hindered me half a million; laughed at my losses," + "mocked at my gains, scorned my nation, thwarted my" + "bargains, cooled my friends, heated mine" + "enemies; and what's his reason? I am a Jew. Hath" + "not a Jew eyes? hath not a Jew hands, organs," + "dimensions, senses, affections, passions? fed with" + "the same food, hurt with the same weapons, subject" + "to the same diseases, healed by the same means," + "warmed and cooled by the same winter and summer, as" + "a Christian is? If you prick us, do we not bleed?" + "if you tickle us, do we not laugh? if you poison" + "us, do we not die? and if you wrong us, shall we not" + "revenge? If we are like you in the rest, we will" + "resemble you in that. If a Jew wrong a Christian," + "what is his humility? Revenge. If a Christian" + "wrong a Jew, what should his sufferance be by" + "Christian example? Why, revenge. The villany you" + "teach me, I will execute, and it shall go hard but I" + "will better the instruction.", "Virtue! a fig! 'tis in ourselves that we are thus" + "or thus. Our bodies are our gardens, to the which" + "our wills are gardeners: so that if we will plant" + "nettles, or sow lettuce, set hyssop and weed up" + "thyme, supply it with one gender of herbs, or" + "distract it with many, either to have it sterile" + "with idleness, or manured with industry, why, the" + "power and corrigible authority of this lies in our" + "wills. If the balance of our lives had not one" + "scale of reason to poise another of sensuality, the" + "blood and baseness of our natures would conduct us" + "to most preposterous conclusions: but we have" + "reason to cool our raging motions, our carnal" + "stings, our unbitted lusts, whereof I take this that" + "you call love to be a sect or scion.", "Blow, winds, and crack your cheeks! rage! blow!" + "You cataracts and hurricanoes, spout" + "Till you have drench'd our steeples, drown'd the cocks!" + "You sulphurous and thought-executing fires," + "Vaunt-couriers to oak-cleaving thunderbolts," + "Singe my white head! And thou, all-shaking thunder," + "Smite flat the thick rotundity o' the world!" + "Crack nature's moulds, an germens spill at once," + "That make ingrateful man!" }; } /** * We will use a SpeechView to display each speech. It's just a LinearLayout * with two text fields. * */ private class SpeechView extends LinearLayout { public SpeechView(Context context, String title, String words) { super(context); this.setOrientation(VERTICAL); // Here we build the child views in code. They could also have // been specified in an XML file. mTitle = new TextView(context); mTitle.setText(title); addView(mTitle, new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)); mDialogue = new TextView(context); mDialogue.setText(words); addView(mDialogue, new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)); } /** * Convenience method to set the title of a SpeechView */ public void setTitle(String title) { mTitle.setText(title); } /** * Convenience method to set the dialogue of a SpeechView */ public void setDialogue(String words) { mDialogue.setText(words); } private TextView mTitle; private TextView mDialogue; } } 。

该例子中自定义了适配器 SpeechListAdapter (其继承父类BaseAdapter)以及作为记录模板的 SpeechView（其父类为LinearLayout）。 SpeechListAdapter中的方法getView实现了返回指定位置的记录显示对象的逻辑.

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