做相册和带图片查看功能的应用都应该用得上
1.MainActivity 单击按钮时,跳转到 ImageShowActivity
- package com.small.photos;
-
- import com.small.photos.R;
- import android.widget.*;
- import android.app.Activity;
- import android.content.Intent;
- import android.os.Bundle;
- import android.view.View;
- import android.view.View.OnClickListener;
-
- public class MainActivityextends Activity {
-
- OnClickListener listener0 = null;
- Button button0;
-
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
-
-
- listener0 = new OnClickListener() {
- public void onClick(View v) {
- Intent intent = new Intent(MainActivity.this,
- ImageShowActivity.class);
- startActivity(intent);
- }
- };
-
- button0 = (Button) findViewById(R.id.image_show_button);
- button0.setOnClickListener(listener0);
- }
-
- }
package com.small.photos;
import com.small.photos.R;
import android.widget.*;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
OnClickListener listener0 = null;
Button button0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 单击按钮跳转到ImageShowActivity
listener0 = new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
ImageShowActivity.class);
startActivity(intent);
}
};
button0 = (Button) findViewById(R.id.image_show_button);
button0.setOnClickListener(listener0);
}
}
2. main.xml 定义入口按钮
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <Button android:id="@+id/image_show_button"
- android:text="ImageSwitcher Gallery"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content">
- </Button>
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button android:id="@+id/image_show_button"
android:text="ImageSwitcher Gallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
</LinearLayout>
3.image_show.xml
ImageSwitcher是用来图片显示那块区域的控件 Gallery 是来控制底下那个图标列表索引用的
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
-
- <ImageSwitcher android:id="@+id/ImageSwitcher01"
- android:layout_height="fill_parent"
- android:layout_width="fill_parent"
- android:layout_alignParentTop="true"
- android:layout_alignParentLeft="true">
- </ImageSwitcher>
-
-
- <Gallery
- android:id="@+id/gallery"
- android:background="#55000000"
- android:layout_width="fill_parent"
- android:layout_height="60dp"
- android:layout_alignParentBottom="true"
- android:layout_alignParentLeft="true"
- android:gravity="center_vertical"
- android:spacing="16dp" />
-
-
-
- </RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageSwitcher android:id="@+id/ImageSwitcher01"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true">
</ImageSwitcher>
<Gallery
android:id="@+id/gallery"
android:background="#55000000"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:gravity="center_vertical"
android:spacing="16dp" />
</RelativeLayout>
4.ImageShowActivity
R.drawable.sample_thumb_0 为图片的标识
图片放在res/drawable/目录下 图片名称为sample_thumb_0.gif
- package com.small.photos;
-
- import android.app.Activity;
- import android.content.Context;
- import android.os.Bundle;
- import android.view.View;
- import android.view.ViewGroup;
- import android.view.Window;
- import android.view.animation.AnimationUtils;
- import android.widget.AdapterView;
- import android.widget.BaseAdapter;
- import android.widget.Gallery;
- import android.widget.ImageSwitcher;
- import android.widget.ImageView;
- import android.widget.AdapterView.OnItemSelectedListener;
- import android.widget.RelativeLayout.LayoutParams;
- import android.widget.ViewSwitcher.ViewFactory;
-
- public class ImageShowActivityextends Activityimplements ViewFactory,
- OnItemSelectedListener {
-
- ImageSwitcher mSwitcher;
- private Integer[] mThumbIds = { R.drawable.sample_thumb_0,
- R.drawable.sample_thumb_1, R.drawable.sample_0, R.drawable.sample_1 };
-
- private Integer[] mImageIds = { R.drawable.sample_thumb_0,
- R.drawable.sample_thumb_1, R.drawable.sample_0, R.drawable.sample_1 };
-
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE);
-
- setContentView(R.layout.image_show);
- setTitle("ImageShowActivity");
-
- mSwitcher = (ImageSwitcher) findViewById(R.id.ImageSwitcher01);
-
- mSwitcher.setFactory(this);
- mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
- android.R.anim.fade_in));
- mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
- android.R.anim.fade_out));
-
- Gallery g = (Gallery) findViewById(R.id.gallery);
-
- g.setAdapter(new ImageAdapter(this));
-
- g.setOnItemSelectedListener(this);
-
- }
-
- @SuppressWarnings("unchecked")
- public void onItemSelected(AdapterView parent, View v,int position,long id) {
- mSwitcher.setImageResource(mImageIds[position]);
- }
-
- @SuppressWarnings("unchecked")
- public void onNothingSelected(AdapterView parent) {
- }
-
- @Override
- public View makeView() {
- ImageView i = new ImageView(this);
- i.setBackgroundColor(0xFF000000);
- i.setScaleType(ImageView.ScaleType.FIT_CENTER);
- i.setLayoutParams(new ImageSwitcher.LayoutParams(
- LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
- return i;
- }
-
- public class ImageAdapterextends BaseAdapter {
- private Context mContext;
-
- public ImageAdapter(Context c) {
- mContext = c;
- }
-
- public int getCount() {
- return mThumbIds.length;
- }
-
- public Object getItem(int position) {
- return position;
- }
-
- public long getItemId(int position) {
- return position;
- }
-
-
-
-
- public View getView(int position, View convertView, ViewGroup parent) {
- ImageView i = new ImageView(mContext);
-
- i.setImageResource(mThumbIds[position]);
- i.setAdjustViewBounds(true);
- i.setLayoutParams(new Gallery.LayoutParams(
- LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
- i.setBackgroundResource(R.drawable.picture_frame);
- return i;
- }
-
- }
-
- }
package com.small.photos;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.ViewSwitcher.ViewFactory;
public class ImageShowActivity extends Activity implements ViewFactory,
OnItemSelectedListener {
/** Called when the activity is first created. */
ImageSwitcher mSwitcher;
private Integer[] mThumbIds = { R.drawable.sample_thumb_0,
R.drawable.sample_thumb_1, R.drawable.sample_0, R.drawable.sample_1 };
private Integer[] mImageIds = { R.drawable.sample_thumb_0,
R.drawable.sample_thumb_1, R.drawable.sample_0, R.drawable.sample_1 };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.image_show);
setTitle("ImageShowActivity");
mSwitcher = (ImageSwitcher) findViewById(R.id.ImageSwitcher01);
// 系统的anim中的fade_in.xml
mSwitcher.setFactory(this);
mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
Gallery g = (Gallery) findViewById(R.id.gallery);
// 为缩略图浏览器指定一个适配器
g.setAdapter(new ImageAdapter(this));
// 响应 在缩略图列表上选中某个缩略图后的 事件
g.setOnItemSelectedListener(this);
}
@SuppressWarnings("unchecked")
public void onItemSelected(AdapterView parent, View v, int position, long id) {
mSwitcher.setImageResource(mImageIds[position]);
}
@SuppressWarnings("unchecked")
public void onNothingSelected(AdapterView parent) {
}
@Override
public View makeView() {
ImageView i = new ImageView(this);
i.setBackgroundColor(0xFF000000);
i.setScaleType(ImageView.ScaleType.FIT_CENTER);
i.setLayoutParams(new ImageSwitcher.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return i;
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
//getView方法动态生成一个ImageView,然后利用setLayoutParams、setImageResource、
//setBackgroundResource分别设定图片大小、图片源文件和图片背景。当图片被显示到当前
//屏幕的时候,这个函数就会被自动回调来提供要显示的ImageView
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
i.setImageResource(mThumbIds[position]);
i.setAdjustViewBounds(true);
i.setLayoutParams(new Gallery.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
i.setBackgroundResource(R.drawable.picture_frame);
return i;
}
}
}
5.AndroidManifest.xml 标识MainActivity为一个程序的开始
- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.small.photos"
- android:versionCode="1"
- android:versionName="1.0">
- <application android:label="@string/app_name">
- <activity android:name=".ImageShowActivity"
- android:label="@string/app_name">
-
- </activity>
-
- <activity android:name="MainActivity"><intent-filter><action android:name="android.intent.action.MAIN"></action>
- <category android:name="android.intent.category.LAUNCHER"></category>
- </intent-filter>
- </activity>
- </application>
-
-
- </manifest>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.small.photos"
android:versionCode="1"
android:versionName="1.0">
<application android:label="@string/app_name">
<activity android:name=".ImageShowActivity"
android:label="@string/app_name">
</activity>
<activity android:name="MainActivity"><intent-filter><action android:name="android.intent.action.MAIN"></action>
<category android:name="android.intent.category.LAUNCHER"></category>
</intent-filter>
</activity>
</application>
</manifest>
基本上就是这些了,然后启动吧!