import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Handler;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.constraint.ConstraintLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
private static final int PERMISSION_REQUEST = 0;
private static final int RESULT_LOAD_IMAGE = 1;
ImageView imageView;
Button button;
private ProgressBar progressBar;
private Handler handler = new Handler();
private Runnable runnable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
View view = findViewById(R.id.view3);
Random random = new Random();
int minHeight = 100; // altura mínima desejada
int maxHeight = 500; // altura máxima desejada
int height = random.nextInt(maxHeight - minHeight + 1) + minHeight; // altura aleatória entre a altura mínima e máxima
view.getLayoutParams().height = height; // define a altura aleatória para a View
view.requestLayout(); // solicita o layout para atualizar a exibição da View
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED){
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSION_REQUEST);
}
imageView = (ImageView) findViewById(R.id.imageView);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent (Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode){
case PERMISSION_REQUEST:
if(grantResults[0] == PackageManager.PERMISSION_GRANTED){
Toast.makeText(this, "Permission granted!", Toast.LENGTH_SHORT).show();
finish();
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (resultCode == RESULT_OK) {
Uri selectedImage = data.getData();
String[] filePathColunm = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColunm, null, null, null);
cursor.moveToFirst();
int collunmIndex = cursor.getColumnIndex(filePathColunm[0]);
String picturePath = cursor.getString(collunmIndex);
cursor.close();
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
}
private void setLayoutParams() {
}
}
Codigos pro activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.848" />
<ImageView
android:id="@+id/imageView"
android:layout_width="202dp"
android:layout_height="210dp"
android:background="#F9A825"
android:baselineAlignBottom="false"
android:clickable="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.421"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.276"
tools:srcCompat="@tools:sample/avatars" />
<Button
android:id="@+id/button"
android:layout_width="187dp"
android:layout_height="202dp"
android:background="#00FFFFFF"
android:text="UPLOAD"
android:textColor="#12068E7D"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.428"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.287" /><![CDATA[
/>
]]>
<ProgressBar
android:id="@+id/progressBar5"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="244dp"
android:layout_height="25dp"
android:max="100"
android:progress="30"
android:progressBackgroundTint="#CDFF8308"
android:visibility="visible"
app:layout_constraintBottom_toTopOf="@+id/textView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView"
tools:visibility="visible" />
<View
android:id="@+id/view3"
android:layout_width="42dp"
android:layout_height="197dp"
android:background="#B20AE316"
tools:layout_editor_absoluteX="335dp"
tools:layout_editor_absoluteY="169dp" />
</android.support.constraint.ConstraintLayout>
Video:
//////////////////////////////////////
