用Intent隱式跳轉呼叫相簿回撥
阿新 • • 發佈:2019-01-09
package com.work.list.jiwazii;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private Button button;
private final int RC_CAMERA = 1; private final int RC_ALBUM = 2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //通過intent隱式跳轉獲取系統相機相簿 //初始化控制元件 initView(); //點選事件 button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //點選按鈕觸發事件 openbutton(); } }); } private void openbutton() { //定義dialog AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setTitle("請選擇"); builder.setItems(new String[]{"相機", "相簿"}, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { switch (which) { //相機 case 0: Intent intent_camera = new Intent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(intent_camera, RC_CAMERA);//rc_camera break; //相簿 case 1: Intent intent_album = new Intent(Intent.ACTION_PICK); intent_album.setType("image/*"); startActivityForResult(intent_album,RC_ALBUM); break; } } }); builder.create().show(); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { switch (requestCode) { case RC_CAMERA: Toast.makeText(MainActivity.this, "相機回撥", Toast.LENGTH_SHORT).show(); break; case RC_ALBUM: Toast.makeText(MainActivity.this, "相簿回撥", Toast.LENGTH_SHORT).show(); break; } } private void initView() { button = findViewById(R.id.button); }
}
//----------------佈局----------------
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="選擇圖片"
android:textSize="25sp" />