Android学习08-----Android中的基本控件（下）(4)_Toast ImageSwitcher TextSwitcher

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一、信息提示框： Toast

1 、提示文字信息

Main.xml

 

Toast01Activity.java

package com.iflytek.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class Toast01Activity extends Activity {
	private Button butA = null;
	private Button butB = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		this.butA = (Button) super.findViewById(R.id.butA);
		this.butB = (Button) super.findViewById(R.id.butB);
		this.butA.setOnClickListener(new OnClickListenerImplLong());
		this.butB.setOnClickListener(new OnClickListenerImplShort());

	}

	private class OnClickListenerImplLong implements OnClickListener {

		@Override
		public void onClick(View v) {
			Toast.makeText(Toast01Activity.this, "长时间显示的Toast信息提示框",
					Toast.LENGTH_LONG).show();
		}

	}

	private class OnClickListenerImplShort implements OnClickListener {

		@Override
		public void onClick(View v) {
			Toast.makeText(Toast01Activity.this, "短时间显示的Toast信息提示框",
					Toast.LENGTH_SHORT).show();
		}

	}
}

 

2 、自定义显示风格

Toast02Activity.java

package com.iflytek.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

public class Toast02Activity extends Activity {
	private Button but = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		this.but = (Button) super.findViewById(R.id.but);
		this.but.setOnClickListener(new OnClickListenerImpl());
	}

	private class OnClickListenerImpl implements OnClickListener {

		@Override
		public void onClick(View v) {
			Toast myToast = Toast.makeText(Toast02Activity.this, "安徽合肥",
					Toast.LENGTH_LONG);
			myToast.setGravity(Gravity.CENTER, 60, 30);
			LinearLayout myToastView = (LinearLayout) myToast.getView(); // 线性布局
			ImageView img = new ImageView(Toast02Activity.this);
			img.setImageResource(R.drawable.ic_launcher);
			myToastView.addView(img, 0); // 放在最前面
			myToast.show();
		}

	}
}

 

二、图片切换： ImageSwitcher

Main.xml

 

ImageSwitcherActivity.java

package com.iflytek.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;

public class ImageSwitcherActivity extends Activity {
	private Button butPrevious = null;
	private Button butNext = null;
	private ImageSwitcher myImageSwitcher = null;
	private int[] imgRes = new int[] { R.drawable.ispic_a, R.drawable.ispic_b,
			R.drawable.ispic_c, R.drawable.ispic_d, R.drawable.ispic_e };
	private int foot = 0; // 表示当前已经显示的数组图片的脚标

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		this.myImageSwitcher = (ImageSwitcher) super
				.findViewById(R.id.myImageSwitcher);
		this.butPrevious = (Button) super.findViewById(R.id.butPrevious);
		this.butNext = (Button) super.findViewById(R.id.butNext);

		this.myImageSwitcher.setFactory(new ViewFactoryImpl());
		this.myImageSwitcher.setImageResource(this.imgRes[this.foot++]);

		this.myImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_in));

		this.myImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_out));

		this.butPrevious.setOnClickListener(new OnClickListenerPrevious());
		this.butNext.setOnClickListener(new OnClickListenerNext());
	}

	private class OnClickListenerPrevious implements OnClickListener {

		@Override
		public void onClick(View view) {
			ImageSwitcherActivity.this.myImageSwitcher
					.setImageResource(ImageSwitcherActivity.this.imgRes[ImageSwitcherActivity.this.foot--]);
			ImageSwitcherActivity.this.checkButEnable();
		}

	}

	private class OnClickListenerNext implements OnClickListener {

		@Override
		public void onClick(View view) {
			ImageSwitcherActivity.this.myImageSwitcher
					.setImageResource(ImageSwitcherActivity.this.imgRes[ImageSwitcherActivity.this.foot++]);
			ImageSwitcherActivity.this.checkButEnable();
		}

	}

	private void checkButEnable() { // 判断按钮是否可用
		if (this.foot < this.imgRes.length - 1) {
			this.butNext.setEnabled(true);
		} else {
			this.butNext.setEnabled(false);
		}
		if (this.foot == 0) {
			this.butPrevious.setEnabled(false);
		} else {
			this.butPrevious.setEnabled(true);
		}
	}

	private class ViewFactoryImpl implements ViewFactory {
		@Override
		public View makeView() {
			ImageView img = new ImageView(ImageSwitcherActivity.this);
			img.setBackgroundColor(0xFFFFFFFF); // 设置背景
			img.setScaleType(ImageView.ScaleType.CENTER);
			img.setLayoutParams(new ImageSwitcher.LayoutParams(
					LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); // 定义组件
			return img;
		}

	}
}

 

三、文本切换： TextSwitcher

Main.xml

 

TextSwitcherActivity.java

package com.iflytek.demo;

import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher.ViewFactory;

public class TextSwitcherActivity extends Activity {
	private TextSwitcher myTextSwitcher = null;
	private Button but = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		this.myTextSwitcher = (TextSwitcher) super
				.findViewById(R.id.myTextSwitcher);
		this.but = (Button) super.findViewById(R.id.but);
		this.myTextSwitcher.setFactory(new ViewFactoryImpl());
		this.myTextSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_in));
		this.myTextSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_out));
		this.but.setOnClickListener(new OnClickListenerImpl());
	}

	private class OnClickListenerImpl implements OnClickListener {
		@Override
		public void onClick(View v) {
			TextSwitcherActivity.this.myTextSwitcher.setText("当前时间为："
					+ new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS")
							.format(new Date()));
		}
	}

	private class ViewFactoryImpl implements ViewFactory {
		@Override
		public View makeView() {
			TextView txt = new TextView(TextSwitcherActivity.this);
			txt.setBackgroundColor(0xFFFFFFFF);
			txt.setTextColor(0xFF000000);
			txt.setLayoutParams(new TextSwitcher.LayoutParams(
					LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
			txt.setTextSize(30);
			return txt;
		}

	}
}

 

四、拖拉图片： Gallery

1 、 BaseAdapter 实现

Gallery01_BaseAdapterActivity.java

package com.iflytek.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Gallery;
import android.widget.Toast;

public class Gallery01_BaseAdapterActivity extends Activity {
	private Gallery gallery = null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        this.gallery = (Gallery) super.findViewById(R.id.myGallery);
		this.gallery.setAdapter(new ImageGalleryAdapter(this));
		this.gallery.setOnItemClickListener(new OnItemClickListenerImpl()) ;
    }
    
    private class OnItemClickListenerImpl implements OnItemClickListener {

		@Override
		public void onItemClick(AdapterView parent, View view, int position,
				long id) {
			Toast.makeText(Gallery01_BaseAdapterActivity.this, String.valueOf(position),
					Toast.LENGTH_SHORT).show();
		}
	}
}

 

ImageGalleryAdapter.java

package com.iflytek.demo;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class ImageGalleryAdapter extends BaseAdapter {
	private Context context = null;
	// 里面的所有方法表示的是可以根据指定的显示图片的数量，进行每个图片的处理
	private int[] imgRes = new int[] { R.drawable.ispic_a, R.drawable.ispic_b,
			R.drawable.ispic_c, R.drawable.ispic_d, R.drawable.ispic_e }; // 这些是所要显示的图片的资源

	public ImageGalleryAdapter(Context context) {
		this.context = context;
	}

	@Override
	public int getCount() { // 取得要显示的内容的数量
		return this.imgRes.length; // 资源的数量
	}

	@Override
	public Object getItem(int position) {
		return this.imgRes[position];
	}

	@Override
	public long getItemId(int position) { // 取得项的ID
		return this.imgRes[position];
	}

	// 将资源设置到一个组件之中，很明显这个组件就是ImageView组件
	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ImageView img = new ImageView(this.context);
		img.setBackgroundColor(0xFFFFFFFF);
		img.setImageResource(this.imgRes[position]); // 将指定的资源设置到ImageView中
		img.setScaleType(ImageView.ScaleType.CENTER); // 居中显示
		img.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT,
				LayoutParams.WRAP_CONTENT));
		return img;
	}

}

 

 

main.xml

 

 

2 、 SimpleAdapter 实现

grid_layout.xml

 

 

main.xml

 

Gallery02_SimpleAdapterActivity.java

package com.iflytek.demo;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Gallery;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class Gallery02_SimpleAdapterActivity extends Activity {
	private Gallery gallery = null;
	private SimpleAdapter simpleAdapter = null;
	private List> list = new ArrayList>();

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		this.initAdapter();
		this.gallery = (Gallery) super.findViewById(R.id.myGallery);
		this.gallery.setAdapter(this.simpleAdapter);
		this.gallery.setOnItemClickListener(new OnItemClickListenerImpl());
	}

	private void initAdapter() {
		Field[] fields = R.drawable.class.getDeclaredFields(); // 取得全部的属性
		for (int x = 0; x < fields.length; x++) {
			if (fields[x].getName().startsWith("ispic_")) { // 我们所需要的图片
				Map map = new HashMap();
				try {
					map.put("img", fields[x].getInt(R.drawable.class)); // 必须定义好名称是img
				} catch (Exception e) {
				}
				this.list.add(map);
			}
		}
		this.simpleAdapter = new SimpleAdapter(this, this.list,
				R.layout.grid_layout, new String[] { "img" },
				new int[] { R.id.img });
	}

	private class OnItemClickListenerImpl implements OnItemClickListener {

		@Override
		public void onItemClick(AdapterView parent, View view, int position,
				long id) {
			Toast.makeText(Gallery02_SimpleAdapterActivity.this,
					String.valueOf(position), Toast.LENGTH_SHORT).show();
		}
	}
}

 

 

3 、图片浏览

Gallery03_Activity.java

package com.iflytek.demo;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.SimpleAdapter;
import android.widget.ViewSwitcher.ViewFactory;

public class Gallery03_Activity extends Activity {
	private Gallery gallery = null;
	private SimpleAdapter simpleAdapter = null;
	private List> list = new ArrayList>();
	private ImageSwitcher myImageSwitcher = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		this.initAdapter();
		this.gallery = (Gallery) super.findViewById(R.id.myGallery);
		this.myImageSwitcher = (ImageSwitcher) super
				.findViewById(R.id.myImageSwitcher);
		this.gallery.setAdapter(this.simpleAdapter);
		this.myImageSwitcher.setFactory(new ViewFactoryImpl());
		this.gallery.setOnItemClickListener(new OnItemClickListenerImpl());
	}

	private void initAdapter() {
		Field[] fields = R.drawable.class.getDeclaredFields(); // 取得全部的属性
		for (int x = 0; x < fields.length; x++) {
			if (fields[x].getName().startsWith("ispic_")) { // 我们所需要的图片
				Map map = new HashMap();
				try {
					map.put("img", fields[x].getInt(R.drawable.class)); // 必须定义好名称是img
				} catch (Exception e) {
				}
				this.list.add(map);
			}
		}
		this.simpleAdapter = new SimpleAdapter(this, this.list,
				R.layout.grid_layout, new String[] { "img" },
				new int[] { R.id.img });
	}

	private class OnItemClickListenerImpl implements OnItemClickListener {

		@Override
		public void onItemClick(AdapterView parent, View view, int position,
				long id) {
			Map map = (Map) parent
					.getAdapter().getItem(position);
			Gallery03_Activity.this.myImageSwitcher.setImageResource(map.get("img"));
		}
	}

	private class ViewFactoryImpl implements ViewFactory {

		@Override
		public View makeView() {
			ImageView img = new ImageView(Gallery03_Activity.this);
			img.setBackgroundColor(0xFFFFFFFF);
			img.setScaleType(ImageView.ScaleType.CENTER);
			img.setLayoutParams(new ImageSwitcher.LayoutParams(
					LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
			return img;
		}

	}
}

 

 

grid_layout.xml

 

 

main.xml