利用Intent，打开word，pdf等资料

本例演示如何通过Intent来打开手机sd卡中的word，pdf文件，这里实际上是通过Intent打开手机中能够阅读word，或pdf的应用，让那个应用来打开文件。而不是我们这个例子本身能够打开文件。

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直接上代码：

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activity_main.xml:

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"     >    <Button        android:id="@+id/btn_open_word"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:text="打开word" />        <Button        android:id="@+id/btn_open_pdf"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:layout_below="@+id/btn_open_word"        android:text="打开pdf" /></RelativeLayout>

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MainActivity.java:

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public class MainActivity extends Activity {	private static final String TAG = "MainActivity";		private Button btnOpenWord;	private Button btnOpenPdf;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);				btnOpenWord = (Button)findViewById(R.id.btn_open_word);		btnOpenPdf = (Button)findViewById(R.id.btn_open_pdf);				btnOpenWord.setOnClickListener(new OnClickListener() {						@Override			public void onClick(View v) {								File file = new File(getSDPath()+"/***.doc");//这里更改为你的名称                Log.e(TAG, "file exsit："+file.getPath());                                if (file.exists()) {                    Uri path = Uri.fromFile(file);                    Intent intent = new Intent(Intent.ACTION_VIEW);                    intent.setDataAndType(path, "application/msword");                    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);                    try {                        startActivity(intent);                    }                     catch (ActivityNotFoundException e) {                        Toast.makeText(MainActivity.this,                             "No Application Available to View WORD",                             Toast.LENGTH_SHORT).show();                    }                }			}		});				btnOpenPdf.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                File file = new File(getSDPath()+"/***.pdf");//这里更改为你的名称                Log.e(TAG, "file exsit："+file.exists());                                if (file.exists()) {                    Uri path = Uri.fromFile(file);                    Intent intent = new Intent(Intent.ACTION_VIEW);                    intent.setDataAndType(path, "application/pdf");                    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);                    try {                        startActivity(intent);                    }                     catch (ActivityNotFoundException e) {                        Toast.makeText(MainActivity.this,                             "No Application Available to View PDF",                             Toast.LENGTH_SHORT).show();                    }                }            }        });	}	/**	 * 获取sd卡路径	 * 	 * */	private String getSDPath(){			       File sdDir = null;	       boolean sdCardExist = android.os.Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());//判断sd卡是否存在	       if(sdCardExist){	    	   	          sdDir = Environment.getExternalStorageDirectory();//获取目录	       }  	       	       Log.e(TAG, "sdCard:"+sdDir.toString());	       return sdDir.toString();	} }

在我的机器Nexus s中，能够通过Document Viewer正常打开word和pdf

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