android用于打開各種文件的intent

import android.app.Activity;

import android.content.Intent;
import android.net.Uri;
import android.net.Uri.Builder;
import java.io.File;
import android.content.Intent;
//自定義android Intent類，
//可用于獲取打開以下文件的intent
//PDF,PPT,WORD,EXCEL,CHM,HTML,TEXT,AUDIO,VIDEO
示例:
//這個不行，可能是因為PDF.apk程序沒有權限訪問其它APK里的asset資源文件,又或者是路徑寫錯?
//Intent it = getPdfFileIntent("file:///android_asset/helphelp.pdf");
//下面這些都OK
//Intent it = getHtmlFileIntent("/mnt/sdcard/tutorial.html");//SD卡主目錄
//Intent it = getHtmlFileIntent("/sdcard/tutorial.html");//SD卡主目錄,這樣也可以
Intent it = getHtmlFileIntent("/system/etc/tutorial.html");//系統內部的etc目錄
//Intent it = getPdfFileIntent("/system/etc/helphelp.pdf");
//Intent it = getWordFileIntent("/system/etc/help.doc");
//Intent it = getExcelFileIntent("/mnt/sdcard/Book1.xls")
//Intent it = getPptFileIntent("/mnt/sdcard/download/Android_PPT.ppt");//SD卡的download目錄下
//Intent it = getVideoFileIntent("/mnt/sdcard/ice.avi");
//Intent it = getAudioFileIntent("/mnt/sdcard/ren.mp3");
//Intent it = getImageFileIntent("/mnt/sdcard/images/001041580.jpg");
//Intent it = getTextFileIntent("/mnt/sdcard/hello.txt",false);
startActivity( it );
public class MyIntent
{
//android獲取一個用于打開HTML文件的intent
public static Intent getHtmlFileIntent( String param )
{

Uri uri = Uri.parse(param ).buildUpon().encodedAuthority("com.android.htmlfileprovider").scheme("content").encodedPath(param ).build();

Intent intent = new Intent("android.intent.action.VIEW");

intent.setDataAndType(uri, "text/html");

return intent;


}
//android獲取一個用于打開圖片文件的intent
public static Intent getImageFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "image/*");

return intent;


}
//android獲取一個用于打開PDF文件的intent
public static Intent getPdfFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "application/pdf");

return intent;


}
//android獲取一個用于打開文本文件的intent
public static Intent getTextFileIntent( String param, boolean paramBoolean)
{
Intent intent = new Intent("android.intent.action.VIEW");
intent.addCategory("android.intent.category.DEFAULT");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (paramBoolean)
{
Uri uri1 = Uri.parse(param );
intent.setDataAndType(uri1, "text/plain");
}
else
{
Uri uri2 = Uri.fromFile(new File(param ));
intent.setDataAndType(uri2, "text/plain");
}
return intent;
}
//android獲取一個用于打開音頻文件的intent
public static Intent getAudioFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

intent.putExtra("oneshot", 0);

intent.putExtra("configchange", 0);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "audio/*");

return intent;


}
//android獲取一個用于打開視頻文件的intent
public static Intent getVideoFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

intent.putExtra("oneshot", 0);

intent.putExtra("configchange", 0);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "video/*");

return intent;


}
//android獲取一個用于打開CHM文件的intent
public static Intent getChmFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "application/x-chm");

return intent;


}
//android獲取一個用于打開Word文件的intent
public static Intent getWordFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "application/msword");

return intent;


}
//android獲取一個用于打開Excel文件的intent
public static Intent getExcelFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "application/vnd.ms-excel");

return intent;


}
//android獲取一個用于打開PPT文件的intent
public static Intent getPptFileIntent( String param )
{

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File(param ));

intent.setDataAndType(uri, "application/vnd.ms-powerpoint");

return intent;


}
}</pre>