Create Button and TextView dynamically - Android sample
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
TextView textView = new TextView(this);
textView.setText("Text View ");
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(textView, p);
Button buttonView = new Button(this);
buttonView.setText("Button");
buttonView.setOnClickListener(mThisButtonListener);
layout.addView(buttonView, p);
}
private OnClickListener mThisButtonListener = new OnClickListener() {
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Hello !",
Toast.LENGTH_LONG).show();
}
};
}
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entry put iterate Map HashMap Java Android
Map<String, Integer> map = new HashMap<String, Integer>();
map.put("key27", 27);
for (Map.Entry<String, Integer> entry : map.entrySet())
{
String str = entry.getKey();
int n = entry.getValue();
}
To hide a module File->Project Structure Ctrl+Alt+Shift+S
In left panel click on Module which want to hide.
Click on minus symbol (-) on upper left corner of window.
Click Yes.
To delete module from disk click on module in project tree (to select) and press Delete on keyboard.
In left panel click on Module which want to hide.
Click on minus symbol (-) on upper left corner of window.
Click Yes.
To delete module from disk click on module in project tree (to select) and press Delete on keyboard.
The source attachment does not contain the source for the file TextWatcher.class.
You can change the source attachment by clicking Change Attached Source below:
You have to add JDK src.zip path to dialog as on image below.
[caption id="attachment_1091" align="alignleft" width="282" caption="class file editor source not found Eclipse warning"]
[/caption]
Or go to Project > Properties > Java Build Path > Libraries
Expand JRE System Library. Expand rt.jar.
Select Source attachment and double click or Edit.
Type path the source code file (External File…) and press OK.
[caption id="attachment_1094" align="alignleft" width="300" caption="Java project build path"]
[/caption]
[caption id="attachment_1105" align="alignleft" width="300" caption="Java JRE deifiniton path in Eclipse"]
[/caption]
Now if mouse move about keywords String or F3 on keywords and press button in yellow field will opened String.class
You can change the source attachment by clicking Change Attached Source below:
You have to add JDK src.zip path to dialog as on image below.
[caption id="attachment_1091" align="alignleft" width="282" caption="class file editor source not found Eclipse warning"]
[/caption]
Or go to Project > Properties > Java Build Path > Libraries
Expand JRE System Library. Expand rt.jar.
Select Source attachment and double click or Edit.
Type path the source code file (External File…) and press OK.
[caption id="attachment_1094" align="alignleft" width="300" caption="Java project build path"]
[/caption]
Or type path in Java JRE definition
[caption id="attachment_1105" align="alignleft" width="300" caption="Java JRE deifiniton path in Eclipse"]
[/caption]
How open String.class or others keywords definition with Eclipse.
Now if mouse move about keywords String or F3 on keywords and press button in yellow field will opened String.class
Spinner, ArrayAdapter, setOnItemSelectedListener, onItemSelected, setDropDownViewResource
MainClass.java
strings.xml
MainClass.java
public class Vypocet extends Activity {
Spinner hSpinnerMetry;
// .......
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
hSpinnerMetry = (Spinner) findViewById(R.id.idSpinnerMetry);
ArrayAdapter<CharSequence> adapterMetry = ArrayAdapter.createFromResource(
this, R.array.metry_array, android.R.layout.simple_spinner_item);
adapterMetry.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
hSpinnerMetry.setAdapter(adapterMetry);
hSpinnerMetry.setOnItemSelectedListener(
new OnItemSelectedListener() {
public void onItemSelected(
AdapterView<?> parent, View view, int position, long id) {
int nPos = position;
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
}
strings.xml
<string-array name="metry_array">
<item>m</item>
<item>dm</item>
<item>cm</item>
<item>mm</item>
</string-array>
/data/data/<package>/shared_prefs/<package>_preferences.xml
String TAG = "MyActivityName";
File f = new File("/data/data/"+this.getPackageName()
+"/shared_prefs/"+this.getPackageName()+"_preferences.xml");
if(f.exists())
Log.d(TAG, "exist");
else
Log.d(TAG, "not exist");
Editace: 2011-10-22 07:54:35
Počet článků v kategorii: 396
Url:create-button-dynamically-android-sample
