利用Intent，打开word，pdf等文件
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;@Overrideprotected 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() {@Overridepublic 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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