mgBlog

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="de.mgsimon.android.jsonviewer" android:versionCode="1"
  android:versionName="1.0">
  <uses-sdk android:minSdkVersion="8" />
 
  <uses-permission android:name="android.permission.INTERNET" />
 
  <application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".JSONViewerActivity" android:label="@string/app_name">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
  </application>
</manifest>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent" android:layout_height="fill_parent">
 
  <LinearLayout android:layout_height="wrap_content"
    android:id="@+id/linearLayoutUrl" android:layout_width="match_parent">
    <EditText android:id="@+id/editTextURL"
      android:layout_height="wrap_content" android:singleLine="true"
      android:layout_width="0dp" android:layout_weight="2">
      <requestFocus></requestFocus>
    </EditText>
    <ImageButton android:id="@+id/imageButtonLoad"
      android:layout_height="wrap_content" android:src="@android:drawable/ic_media_play"
      android:layout_width="0dp" android:layout_weight="1"></ImageButton>
  </LinearLayout>
 
  <ScrollView android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:layout_below="@+id/linearLayoutUrl"
    android:layout_margin="5dip">
 
    <TextView android:id="@+id/textViewContent"
      android:layout_width="fill_parent" android:layout_height="wrap_content"
      android:textAppearance="?android:attr/textAppearanceMedium" />
 
  </ScrollView>
</RelativeLayout>

package de.mgsimon.android.jsonviewer;
 
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
 
import org.apache.http.HttpResponse;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
 
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
 
public class JSONViewerActivity extends Activity {
 
  private EditText mEditTextUrl;
  private ImageButton mImageButtonLoad;
  private TextView mTextViewContent;
  private URI mUri;
 
  private ProgressDialog mProgressDialog;
 
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
 
    mEditTextUrl = (EditText) findViewById(R.id.editTextURL);
    mEditTextUrl.setText("http://mgsimon.appspot.com/aboutmyrequest");
    mTextViewContent = (TextView) findViewById(R.id.textViewContent);
    mImageButtonLoad = (ImageButton) findViewById(R.id.imageButtonLoad);
    mImageButtonLoad.setOnClickListener(new View.OnClickListener() {
 
      @Override
      public void onClick(View v) {
        try {
          mUri = new URI(mEditTextUrl.getText().toString());
          new UrlLoadTask().execute(mUri);
        } catch (URISyntaxException e) {
          e.printStackTrace();
          mTextViewContent.setText(e.getMessage());
        }
      }
    });
  }
 
  private class UrlLoadTask extends AsyncTask<URI, Void, JSONObject> {
 
    @Override
    protected void onPreExecute() {
      mProgressDialog = ProgressDialog.show(JSONViewerActivity.this, "",
          "Loading. Please wait...", true);
    }
 
    @Override
    protected JSONObject doInBackground(URI... uris) {
      try {
        HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet(uris[0]);
        HttpResponse response = client.execute(get);
        JSONObject jso = new JSONObject(EntityUtils.toString(response
            .getEntity()));
        return (jso);
      } catch (ClientProtocolException e) {
        e.printStackTrace();
        mTextViewContent.setText(e.getMessage());
      } catch (IOException e) {
        e.printStackTrace();
        mTextViewContent.setText(e.getMessage());
      } catch (ParseException e) {
        e.printStackTrace();
        mTextViewContent.setText(e.getMessage());
      } catch (JSONException e) {
        e.printStackTrace();
        mTextViewContent.setText(e.getMessage());
      }
      return null;
    }
 
    @Override
    protected void onPostExecute(JSONObject jso) {
      try {
        if (jso != null)
          mTextViewContent.setText(jso.toString(4));
      } catch (JSONException e) {
        e.printStackTrace();
        mTextViewContent.setText(e.getMessage());
      }
      mProgressDialog.dismiss();
    }
  }
}