![app_info_json.json
{
"_app_info":[
{
"c_app_id":"com",
"c_available":"true",
"c_reason":"2015.",
"c_name":"dary"
},
{
"c_app_id":"com1",
"c_available":"true",
"c_reason":"",
"c_name":"jaja"
},
{
"c_app_id":"com2",
"c_available":"true",
"c_reason":"",
"c_name":"dada"
}
]
}](https://image.slidesharecdn.com/exampleasset-171009081426/85/Example-asset-4-320.jpg)
![Example Asset(MantActivity.Java)
public String readJSONFromAsset() {
String json = "";
try {
InputStream is = getAssets().open("app_info_json.json");
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
json = new String(buffer, "UTF-8");
} catch (IOException ex) {
ex.printStackTrace();
return null;
}
return json;
}](https://image.slidesharecdn.com/exampleasset-171009081426/85/Example-asset-5-320.jpg)
![ArrayList,JSONObject,JSONArray
appList = new ArrayList<AppInfo>();
JSONObject obj = new JSONObject(readJSONFromAsset());
Log.d("JSON", "JSON >>> " + obj.getString("_app_info"));
JSONArray formArray = obj.getJSONArray("_app_info");
for (int i = 0; i < formArray.length(); i++){
JSONObject object =formArray.getJSONObject(i);
String c_app_id = object.getString("c_app_id");
boolean c_available = object.getBoolean("c_available");
String c_reason = object.getString("c_reason");
String c_name = object.getString("c_name");
appList.add(new AppInfo(i, getResources().getIdentifier(
getResources().getStringArray(R.array.app_icon)[i],
"drawable", getPackageName()),getResources().getIdentifier(getResources().getStringArray(R.array.grey_app_icon)[i], "drawable",
getPackageName()), c_name, c_app_id, c_available,c_reason));](https://image.slidesharecdn.com/exampleasset-171009081426/85/Example-asset-7-320.jpg)
Example asset
- 2. What is Assets ? Assets provide a way to include arbitrary files like text, xml, fonts, music, and video in your application. If you try to include these files as "resources", Android will process them into its resource system and you will not be able to get the raw data. If you want to access data untouched, Assets are one way to do it. Assets added to your project will show up just like a file system that can read from by your application using AssetManager.
- 3. How to read file .json from Assets? Step follow up 1. Make asset folder . 2.Cope file .Json ,.xml…. In put Asset folder.(app_info_json.json) 3.Implement code call file .Json ,.xml from Asset folder in Java class : Example below Asset: GridAdapter: ArrayList: JSONObject: JSONArray: GridView: Example
- 4. app_info_json.json { "_app_info":[ { "c_app_id":"com", "c_available":"true", "c_reason":"2015.", "c_name":"dary" }, { "c_app_id":"com1", "c_available":"true", "c_reason":"", "c_name":"jaja" }, { "c_app_id":"com2", "c_available":"true", "c_reason":"", "c_name":"dada" } ] }
- 5. Example Asset(MantActivity.Java) public String readJSONFromAsset() { String json = ""; try { InputStream is = getAssets().open("app_info_json.json"); int size = is.available(); byte[] buffer = new byte[size]; is.read(buffer); is.close(); json = new String(buffer, "UTF-8"); } catch (IOException ex) { ex.printStackTrace(); return null; } return json; }
- 6. GridAdapter(MantActivity.Java) GridAdapter adapter = new GridAdapter(this, appList); public class GridAdapter extends BaseAdapter { Context context; List<AppInfo> appList; public GridAdapter(Context context, List<AppInfo> menuList) { this.context = context; this.appList = menuList; }
- 7. ArrayList,JSONObject,JSONArray appList = new ArrayList<AppInfo>(); JSONObject obj = new JSONObject(readJSONFromAsset()); Log.d("JSON", "JSON >>> " + obj.getString("_app_info")); JSONArray formArray = obj.getJSONArray("_app_info"); for (int i = 0; i < formArray.length(); i++){ JSONObject object =formArray.getJSONObject(i); String c_app_id = object.getString("c_app_id"); boolean c_available = object.getBoolean("c_available"); String c_reason = object.getString("c_reason"); String c_name = object.getString("c_name"); appList.add(new AppInfo(i, getResources().getIdentifier( getResources().getStringArray(R.array.app_icon)[i], "drawable", getPackageName()),getResources().getIdentifier(getResources().getStringArray(R.array.grey_app_icon)[i], "drawable", getPackageName()), c_name, c_app_id, c_available,c_reason));
- 8. GridView GridAdapter adapter = new GridAdapter(this, appList); mAppGridView = new GridView(this); mAppGridView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); mAppGridView.setPadding(19, 45, 19, 0); mAppGridView.setVerticalSpacing(21); mAppGridView.setHorizontalSpacing(23); mAppGridView = (GridView) findViewById(R.id.more_app_gridview); mAppGridView.setNumColumns(4); mAppGridView.setAdapter(adapter); mAppGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { try {
- 9. Data of .Json public class AppInfo { int app_no; int app_icon; int grey_app_icon; String app_name; String app_pakage; Boolean c_available; String c_reason;
- 10. Data of .Json AppInfo(int app_no, int app_icon, int grey_app_icon, String app_name, String app_pakage, Boolean c_available, String c_reason) { this.app_no = app_no; this.app_icon = app_icon; this.grey_app_icon = grey_app_icon; this.app_name = app_name; this.app_pakage = app_pakage; this.c_available = c_available; this.c_reason = c_reason; } public String getApp_pakage() { return app_pakage; } public void setApp_pakage(String app_pakage) { this.app_pakage = app_pakage; }
- 11. MantActivity.XML <GridView android:id="@+id/more_app_gridview" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="30dp" android:columnWidth="175dp" android:listSelector="@drawable/selector_grid_view_btn_basic" android:gravity="center" android:stretchMode="columnWidth" > </GridView>
- 12. The end