private?static?final?String?PATH?=?Environment.getExternalStorageDirectory()?+?"/123.json";
private?android.widget.TextView?jsonTv;
@Override
protected?void?onCreate(Bundle?savedInstanceState)?{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.jsonTv?=?(TextView)?findViewById(R.id.jsonTv);
new?Thread()?{
@Override
public?void?run()?{
Message?msg?=?handler.obtainMessage();
msg.obj?=?getFileFromSD(PATH);
msg.what?=?1;
handler.sendMessage(msg);
}
}.start();
}
private?Handler?handler?=?new?Handler()?{
@Override
public?void?handleMessage(Message?msg)?{
if?(msg.what?==?1)?{
String?result?=?(String)?msg.obj;
try?{
JSONObject?jObj?=?new?JSONObject(result);
jsonTv.setText("name:"+jObj.getString("name")+",age:"+jObj.getInt("age"));
}?catch?(JSONException?e)?{
e.printStackTrace();
}
}
}
};
private?String?getFileFromSD(String?path)?{
String?result?=?"";
try?{
FileInputStream?f?=?new?FileInputStream(path);
BufferedReader?bis?=?new?BufferedReader(new?InputStreamReader(f));
String?line?=?"";
while?((line?=?bis.readLine())?!=?null)?{
result?+=?line;
}
}?catch?(Exception?e)?{
e.printStackTrace();
}
return?result;
}
}<RelativeLayout?xmlns:android="
xmlns:tools="
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<TextView
android:id="@+id/jsonTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</RelativeLayout>
最後，記得在AndroidMenifest文件中加入權限
<uses-permission?android:name="android.permission.READ_EXTERNAL_STORAGE"/> 123.json的內容{"name":"rock","age":20}