I had write a code on trigger Barcode Scanner. I would like to trigger it after i clink on a button, but it doesn't work when i drop the code inside the onclicklistener. Need help on how to resolve this.
I had also include the button inside.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv_isbn = (TextView) findViewById(R.id.tv_display);
btn_camera = (Button) findViewById(R.id.btn_camera);
btn_camera.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
camera();
}
});
}
```
Related
public void ShowMsg(){
Toast.makeText(getApplicationContext(),"No stock in this time.",Toast.LENGTH_SHORT).show();
}
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ShowMsg();
After click the button, show message is not shown before next executing.
You can try to add some delay if you calling method in onCreate
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override.
public void run() {.
// Do something after 1s = 1000ms.
ShowMsg();
}
}, 1000);
I am having a problem in Android Studio. I have got two different buttons and a textView. The effect that I want is as follows:
CASE 1: When bt1 is clicked, "A" is displayed in textView. When the bt2 is clicked, "G" is added in textView so the textView displays "AG".
CASE 2: When bt1 is clicked, "A" is displayed in textView. When bt1 is clicked again, it disappears and the textView is empty.
CASE 3: When CASE 1 is done, as bt1 is clicked, "A" is removed so that textView displays"G".
Your help in altering my code is much appreciated. Thanks in advance!!
Main Activity code:
public class keyboard extends AppCompatActivity {
Button btn1,btn2,btn3;
TextView text;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_keyboard);
text=(TextView)findViewById(R.id.txt);
btn1=(Button)findViewById(R.id.bt1);
btn2=(Button)findViewById(R.id.bt2);
btn1.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
text.setText("A");
text.setVisibility(text.getVisibility() == View.VISIBLE ? View.GONE : View.VISIBLE);
}
});
btn2.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
text.setText(text.getText() + "G");
text.setVisibility(text.getVisibility() == View.VISIBLE ? View.GONE : View.VISIBLE);
}
});}}
Here you go..
public class Keyboard extends AppCompatActivity {
Button btn1, btn2;
TextView text;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_keyboard);
text = findViewById(R.id.txt);
btn1 = findViewById(R.id.bt1);
btn2 = findViewById(R.id.bt2);
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
text.setVisibility(View.VISIBLE);
if (text.getText().equals("A")) {
text.setText("");
text.setVisibility(View.GONE);
} else if (text.getText().equals("AG")) {
text.setText("G");
} else {
text.setText("A");
}
}
});
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
text.setText(String.format("%sG", text.getText()));
}
});
}
}
I have a problem with my code I develop a game on android studio and I meet the following concern.
There are two buttons on my app, a Punch button and a Kick Button and an Imageview in which I animate my images.
When I click on the punch button, I create a drawable animation of two images
when I click on the kick button, I create a drawable animation of two images as well.
The problem is that when I execute this code with two drawable animations, the application crashes !!
public class MainActivity extends AppCompatActivity {
private Button btnPunch;
private Button btnKick;
private ImageView imageView1 ;
private ImageView imageView2 ;
private AnimationDrawable[] animationDrawable = new
AnimationDrawable[2];
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPunch = (Button) findViewById(R.id.btnPunch);
imageView1 = (ImageView)
findViewById(R.id.imageView1);
imageView1.setBackgroundResource(
R.drawable.animationpunch);
animationDrawable[0] = (AnimationDrawable)
imageView1.getBackground();
imageView2 = (ImageView)
findViewById(R.id.imageView2);
imageView2.setBackground
Resource(R.drawable.animatio
nkick);
animationDrawable[1] = (AnimationDrawable)
imageView2.getBackground();
btnPunch.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
animationDrawable[1].stop();
animationDrawable[0].setOneShot(true);
animationDrawable[0].start();
}
});
btnKick.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
animationDrawable[0].stop()
animationDrawable[1].setOneShot(true);
animationDrawable[1].start();
}
});
}
#Override
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
//animationDrawable.start();
}
}
</Code>
I yet use two different imageview for both animations
on the other hand when I remove an animation like the following code, it works well but suddenly I am limited to use the punch button, I would like it to work with both buttons
public class MainActivity extends AppCompatActivity {
private Button btnPunch;
private ImageView imageView1 ;
private AnimationDrawable[] animationDrawable = new
AnimationDrawable[2];
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPunch = (Button) findViewById(R.id.btnPunch);
imageView1 = (ImageView)
findViewById(R.id.imageView1);
imageView1.setBackground
Resource(R.drawable.animatio
npunch);
animationDrawable[0] = (AnimationDrawable)
imageView1.getBackground();
btnPunch.setOnClickListener(new
View.OnClickListener() {
#Override
public void onClick(View v) {
animationDrawable[1].stop();
animationDrawable[0].setOneShot(true);
animationDrawable[0].start();
}
}}
}
#Override
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
//animationDrawable.start();
}
}
click on punch button, it animates my animation unch
I click on kick button, it animates my animation kick
a help?
I'm new to Android Studio (and also pretty new to javascrips), so this might be a stupid question.
I do not want to maintain the same code more than once if possible, which is why I am trying to create a navigation-menu, to be used in all my activities.
So far I have created a "BaseActivity" that contains all the functions for my menu. This one works fine.
Now my problem:
In my other activities I can not get it to show up (not without issues anyway). It seems to me like it overwrites the layout.
My base ("BaseActivity"):
public class BaseActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_base);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mToggle=new ActionBarDrawerToggle(this, mDrawerLayout, R.string.Open, R.string.Close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
NavigationView NavigationView=(NavigationView)findViewById(R.id.navigation_view);
NavigationView.setNavigationItemSelectedListener(this);
}
#Override
public void setContentView(int layoutResID)
{
super.setContentView(R.layout.activity_base);
ViewGroup content = (ViewGroup) findViewById(R.id.navigation_view);
getLayoutInflater().inflate(layoutResID, content, true);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(mToggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if(id==R.id.nav_Home) {
startActivity(new Intent(this, MainActivity.class));
}
else
if(id==R.id.nav_Activity1) {
startActivity(new Intent(this, Activity1.class));
}
return super.onOptionsItemSelected(item);
}
}
If I change the app to start through this activity the menu works, but the layout seems to be overwritten (it's empty).
When I try to run it normally (MainActivity), I get some issues.
MainActivity:
public class MainActivity extends BaseActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); }}
The menu-icon is there, but I can not click on it.
If I remove the code in my MainActivity it works as before (with the layout problem).
I have tried something like this:
public class MainActivity extends BaseActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ViewGroup content = (ViewGroup) findViewById(R.id.navigation_view);
getLayoutInflater().inflate(R.layout.activity_main, content, true);
}}
Not working well. The layout from MainActivity seems to be implemented in the menu. It looks very strange.
Any ideas how to solve my problem?
I am developing a simple app in that my video is playing proper. but now I want to give "thank" message after finishing my video
How can I do this?
MainActivity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
this.setSupportActionBar(toolbar);
final MediaPlayer player = MediaPlayer.create(MainActivity.this,R.raw.video);
Button button = (Button)findViewById(R.id.video_Play);
button.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
player.start();
startActivity(new Intent("com.example.lenovo.play.app.VideoPlay"));
}
});
}
and Second VideoPlay.java
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.video_layout);
view = (VideoView)findViewById(R.id.videoView);
String url = "android.resource://"+getPackageName()+"/"+R.raw.video;
view.setVideoURI(Uri.parse(url));
view.start();
int duration = view.getDuration();
}
Implement MediaPlayer.OnCompletionListener then add your message to onCompletion method:
#Override
public void onCompletion(MediaPlayer mp) {
//message
}