Android执行打开文件的总结

1. Android里面，要打开各种类型的文件，例如PDF,PPT,WORD,EXCEL,CHM,HTML,TEXT,AUDIO,VIDEO ，可以通过Intent来办到。

整理了一个Intent的工具类：

import java.io.File;

import android.content.Intent;
import android.net.Uri;

//PDF,PPT,WORD,EXCEL,CHM,HTML,TEXT,AUDIO,VIDEO   
//示例:   
//Intent it = getTextFileIntent("/sdcard/hello.txt",false);  
//startActivity(it);  

public class OpenFileIntent {

	// android获取一个用于打开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获取一个用于打开图片文件的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获取一个用于打开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获取一个用于打开文本文件的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获取一个用于打开音频文件的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获取一个用于打开视频文件的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获取一个用于打开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获取一个用于打开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获取一个用于打开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获取一个用于打开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;
	}

}

 

2. 如果没有使用UncaughtExceptionHandler类来处理全局异常，那么程序将异常退出造成不好的用户体验。为了防止ActivityNotFoundException错误的出现，在启动Activity之前先判断Intent是否存在。

public static boolean isIntentAvailable(Context context, Intent intent) {
    final PackageManager packageManager = context.getPackageManager();
    List<ResolveInfo> list = packageManager.queryIntentActivities(intent,
            PackageManager.GET_ACTIVITIES);
    return list.size() > 0;
}